the present invention includes a user friendly apparatus and method for replenishing spent dispersant material . in one embodiment one pulls out a dispensing compartment in the manner one pulls out a drawer . once open the dispensing material can be placed in the dispensing drawer and the drawer closed to bring the system to dispensing condition . in anther embodiment a dispensing compartment can be hung from the side of the container and in a further embodiment a fountain like dispenser that allows one to place the dispersant material into the fountain like dispenser so the dispensable material can be flow carried throughout the system . fig1 is a cutaway view showing a dispenser system 10 with an outer housing 11 having an inner container 11 a partially filled with a fluid such as water 25 . typically , system 10 can be used in a pool , spa or other fluid container where fluid treatment is required . for example , the system can be used for the water that is used either for work , pleasure or for drinking . in the embodiment shown the container 11 a is configured in a spa mode with an inlet 30 positioned to draw water into an inlet pipe 29 through a pump 27 . pump 27 increases the pressure of the water and forces the water in fluid conduit 28 on the outlet side of the pump to discharge under high pressure as a high pressure jet at underwater port 28 a . the high pressure fluid jet can provide multiple functions , for example , in a hot tub , the high pressure fluid jet produced by the pump system circulates the water in the hot tub thus ensuring that the water purification materials are dispersed throughout the tub . in addition , the high pressure jet produced by the pump system can also provide a water massages as a user sits in the tub . a further use of a portion of the stream of fluid can occur when fluid is diverted to a dispensing housing to allow the fluid to flows past a dispersant material that is contained in the dispenser housing . in the present invention the high pressure line 28 is in fluid communication with a dispenser 19 which is mounted in the housing 11 . dispenser 19 comprises a housing that contains a dispenser inlet 14 with a fluid restriction 15 in the form of a small aperture with a cross sectional flow diameter on the order of 0 . 010 of an inch while the cross sectional flow diameter of the line 28 and nozzle outlet 28 a may be two inches or more . it will be appreciated that the cross sectional area or size of the aperture 15 and the cross sectional area or size line 28 can be scaled up or down to accommodate various flow conditions but that the ratio of the difference in cross sectional area produces a low pressure region in the dispenser . thus , in the present invention , a purpose of the restriction 15 is to limit the volume flow of high pressure water into chamber 16 in the dispenser 19 but still provide for flow of water at a lower pressure through chamber 16 . in the embodiments shown in fig1 the dispenser 19 contains an open dispersant chamber 16 for placing or retaining dispersant materials therein . that is , cap 13 can be removed and typical materials such as bromine sticks 17 can be dropped in chamber 16 . located in the bottom portion of chamber 16 in dispenser 19 are the water purification materials 17 or other fluid treatment materials . in one embodiment dissolvable materials 17 such as halogens and particularly halogens such as bromine or chlorine tablets are placed directly into chamber 16 by removal of cap 13 which threadingly engages a male thread on dispenser 19 . in operation of the system of fig1 , the top inlet 14 of dispenser 19 receives water under high pressure but low volume flow since only a small amount of water can flow through the restriction 15 . with the cap 13 on dispenser 9 the pressure in the chamber 16 rises sufficient to force water to flow , albeit at a slow velocity , through the dispenser chamber 16 and into the container 11 a through outlet 21 . as shown in fig1 dispenser 19 includes an air pocket 16 a above the water line 18 of the water in the dispenser 19 . it should be understood that the top end 19 a of dispenser is located above the water line 26 in the container 11 a and that the bottom discharge port offers little resistance to fluid returning to container 11 a . consequently , if the cap 13 is not on the dispenser 13 the water will not flow out of dispenser 19 but will seek its own level , namely the level indicated by water line 26 in container 11 a since there is little resistance to flow of water out of the port 21 in dispenser 19 . a further feature of the invention is that the liquid level in the dispenser 19 , which is indicated by reference numeral 18 and the air pocket 16 a combine to provide a reservoir or chamber for fluid . that is , the water flows in the directions indicated by arrows in fig1 . the water flows through chamber 16 and out passage 20 and is discharged into container 11 a through port 21 which is located below the water line 26 . the egress passage 20 is characterized by having a substantially larger diameter than the diameter of the restrictor 15 so as not to impede the flow of water therethrough . as a result , the high pressure low volume flow of water entering the dispenser 16 is forced through the dispenser 19 and into the bottom of the container 11 a where the discharge pressure is primarily determined by the depth of the water “ h ” below the water line . the presence of the air pocket 16 a ensures that if the cap is removed it will be air that escapes from the dispenser rather than the fluid in the chamber . the maintenance of an air pocket in the dispenser housing insures that the fluid level in the system will be below the top of the dispenser housing so that removal of cap 13 will not cause fluid to spill from the housing . thus in the present system the water discharges into a low pressure region in the bottom of container 11 a . if someone should accidentally remove cap 13 the pressure of water entering into the dispenser arrives at a low volume flow with the stream of water directed away from the top opening 19 a to prevent any water or dispenser materials from being blown back at the person as the cap 13 is removed . in addition , the air pocket 16 a can provide a reservoir chamber to absorb water flowing into the dispenser 19 . that is , even with the outlet 21 blocked there is a time lag of several minutes before the water would flow out the top of dispenser 19 thus giving a person time to shut off the recirculation system . in normal operation , the pressure in air pocket 16 a may rise slightly due to the fluid circulation resistance through the dispenser 19 and cause the air pocket 16 a to compress slightly , however , once the cap 13 is removed the water level 18 in the dispenser 19 may rise slightly but under normally conditions the flow will continue to circulate through the dispenser since the fluid resistance to water discharging out the top 19 a of the dispenser 19 is maintained at greater fluid resistance than the fluid resistance to water flowing though the dispenser 19 and back into the container 11 a . in other words , the inlet 15 and the outlet 20 are sized such that if the water under pressure continues to come into the dispenser chamber 16 when the cap 13 is removed the water in the dispenser 19 will not rise over the top of the dispenser housing and spill out of the dispenser 19 . that is , even though a slight increase in the water level 18 can occur water continues to flow through dispenser 19 and back into the container 11 a thereby ensuring that unnecessary spills are avoided . in an alternate embodiment of the invention a removable cartridge or removable cartridges are placed in a cartridge holder that is removably positioned in a dispenser housing . fig2 shows a front view of a cartridge dispenser 40 for receiving a typical fluid treatment material such as water purification material . cartridge 40 comprises an outer sleeve 41 that is rotatable positioned with respect to an inner container 42 which contains a dispersant 39 . a pair of elongated openings 41 a allow fluid to flow enter container 42 through the openings 43 a . located in the bottom of container 42 is a dispersant material 39 such as minerals or the like which are used to treat water . minerals 39 are different from chlorine or bromine tablets and the like which dissolve as they are used as minerals which do not dissolve need to be removed once the minerals have been spent . thus the cartridge 40 comprises a dispersant holder that can be removed from a dispenser housing and replaced with a fresh cartridge . if desired cartridge 40 can be provided with a flotation chamber 45 that is attached directly to the cartridge 40 so the cartridge will float to the top of the dispenser chamber 16 for easy access and thus removal . in another embodiment of the invention a cartridge dispenser is carried by a cartridge holder . fig3 shows a cartridge carrier or cartridge holder 50 for holding one or more cartridges in an end to end condition . cartridge carrier 50 includes a handle 51 and an open body skeleton housing 60 having elongated flexible circumferential edges or ears 60 a and 60 b as part of the skeleton housing . the purpose of the skeleton housing is to allow water to flow through the skeleton housing and into and out of the cartridge held therein while at the same time provide a convenient tool for holding the cartridges in position in the dispenser housing and for removing the cartridges from the dispenser housing . carrier 50 contains a first circumferential lip 50 a that is spaced from a second circumferential lip 50 b with a resilient sealing member such as an o - ring 45 located between the lips to allow one to seal the top of the cartridge carrier 50 to the inside of a dispenser housing to prevent flow past the top of the dispenser housing . fig4 shows a side view of cartridge carrier 50 revealing two ears 56 and 56 a for locking the cartridge carrier 50 into a dispenser locating housing cam 65 , which is shown in fig1 . cartridge career 50 is preferable made from a polymer plastic that is flexibly thin yet sufficiently rigid to hold dispensing cartridges therein . carrier 50 contains side openings 60 f , 60 e , 60 g and 60 h to permit ingress or egress of fluid through the skeleton housing 60 . while only one cartridge dispenser 40 is shown in cartridge holder 50 additional cartridges holder can be placed in the cartridges holder to provide for different dispersants . fig5 shows a sectional view of the cartridge carrier 50 taken along lines 55 to show the cylindrical open body skeleton housing 60 with ears 60 a and 60 b being resiliently displaceable radially outward ( see arrows ) to allow lateral insertion of the cartridge 40 therein . a lower stop 43 c extends around the bottom of the skeleton housing to hold the cartridge in position . in order to hold a plurality of dispenser cartridges in a fixed position in the cartridge holder 50 reference should be made to fig3 which shows internal circumferential bands that form a protruding partial circumferential ridge . that is , a top circumferential ridge 44 a holds the top cartridge dispenser 40 , a second identical partial circumferential ridge 44 b can hold a second cartridge dispenser and a third identical partial circumferential ridge 44 c located on skeleton housing 60 can hold a third dispensing cartridge therein . a circumferential mating stop , such as a mating circumferential recess 40 a located on cartridge 40 allow one to maintain the cartridge 40 in the proper axial location in skeleton housing 60 . the flexible ears 60 a and 60 b and the skeleton body 60 which flex radially outward can be configured to provide a slight frictional fit between the outer surface of the cartridge and the inner surface of the skeleton holder 60 to thereby hold the cartridge in position during insertion and removal of the cartridge from the dispensers as well as to avoid movement of the cartridge in the housing due to changing water conditions in the dispenser housing which could cause unnecessary noise . fig1 shows an exploded view of the portion of the dispensing system that is fixedly attached to a panel 70 and fig6 – 10 show the unassembled components for forming a dispensing system in either an existing fluid system or a new fluid system . the cartridge holder of fig3 is placeable directly into the housing 61 shown in fig6 and an isolated cross sectional view of the flow around the skeleton housing and the cartridge 12 is shown in general detail in fig1 . in order to illustrate the attachment and operation of the system with dispersant cartridges reference should be made to the dispersant housing components illustrated in fig6 – 10 . the dispersant housing 61 shown in fig1 contains an upper end collar 61 a for securement to a housing head , a circumferential inlet port 61 b , a central chamber 61 d with a dispenser 40 therein and a lower outlet 61 c . dispenser housing 61 is mountable below a panel on a water system and is connected to the inlet and outlets as illustrated in fig1 . dispenser housing collar 61 a includes an internal cylindrical surface 61 e for mating with a dispenser housing head and an alignment notches 61 f for engaging with alignment members in the dispenser housing head 62 . fig7 is a pictorial view of the dispenser housing head 62 that is securable to the dispenser housing 61 through an adhesive or solvent bonding or the like . that is , in the preferred embodiment dispenser housing 61 and dispenser housing head 62 can be made from materials such as a polymer plastic and can permanently secured to each other through adhesives or the like . dispenser housing head 62 includes a circumferential lip 62 a for securing above a panel to support the dispenser housing head thereon . located along the body of dispenser housing head 62 is a set of external threads 62 b , an alignment member 62 d and a male cylindrical mating surface 62 c for insertion into the female cylindrical surface 61 e on dispenser housing 61 . located within housing head 62 is a set of internal threads 62 f for engagement with a removable cover . the use of a separate dispenser housing 61 with a collar permits one to assembly the unit on a system through placement of parts above and below the panel of the unit that is receiving the dispensing system of the present invention . fig8 is a pictorial view of a dispenser housing securement nut 63 having a set of internal threads 63 c , a set of hexagon lands 63 b to allow one to rotate the nut 63 and a flange 63 a for abutment against a bottom side of a panel on a circulation system . fig9 is a pictorial view of a decorative cap 64 having a set of circumferentially spaced finger grips 64 a . cap 64 includes a flange 64 b for abutting attachment to the top of the dispenser housing head 62 and a set of external male threads 64 c for engaging female threads 62 d on dispenser housing head 62 . fig1 is a pictorial view of the dispenser housing locking cam collar 65 that is mounted in dispenser housing head 62 to enable one to lock a dispenser cartridge carrier 50 in position . cam collar 65 includes a cylindrical body 65 a with openings 65 b on each side . openings 65 b includes a vertical slot region 65 c and a lateral slot 65 d with a lip 65 e extending therein to lock a dispenser carrier therein . that is one pushes the cartridge carrier 50 ( see fig1 ) down with ears 56 and 56 a located in alignment with the vertical ; slot region 65 c and an identical vertical slot region on the opposite side . once lowered the cartridge carrier is rotated to cause the ears 56 and 56 a engage lateral stops 65 b and 65 c to retain the cartridge carrier therein . fig1 shows a pictorial exploded view of a panel 70 and a dispensing cartridge housing 61 to reveal the members 64 , 65 and 62 are located above the panel 70 and the nut 63 and dispenser housing 61 are positioned below the panel for the in situ assembly of the unit in a fluid circulation system . a feature of the invention is that the system can be assembled on site as an after market item or can be mounted on original equipment during manufacture of the water circulation system using conventional techniques . fig1 shows that in the first step the dispenser housing head 62 is inserted though an opening 74 in a top panel 70 . once inserted the external threaded section 62 b extends through the panel 70 . once threaded section 62 b extends through the opening in panel 70 the housing nut 63 can be positioned on threads 62 b and tightened to firmly secure the housing head 62 to panel 70 . thus the housing head 62 and housing nut 63 are sandwiched around panel 70 . one is now in a position to complete the installation of the dispensing system . with the housing head 62 secured to panel 70 the remaining components can be secured thereto from above and below the panel . that is , the dispenser housing 61 , which is located below the panel 70 , has internal mating surface 61 e , which is securable to the external dispenser housing head cylindrical mating surface 62 c , which extends through the panel . preferably , the dispenser housing and dispenser housing head are formed of pvc pipe and can be joined together through the use of solvent cement or the like . by permitting the securement of the dispenser housing to the dispenser housing head below the panel , as shown in fig5 , one can maintain a minimum size opening in the panel yet permit lateral extension 61 b on dispenser housing 61 since the dispenser housing 61 need not pass through the opening 71 in the panel 70 . once the dispenser housing 61 and dispenser housing head 62 are secured to each other the dispenser housing locking collar 65 can be secured into the dispenser housing head 62 , preferably through solvent cement or the like . the dispenser housing is now in a condition for receiving a cartridge carrier 50 and for locking the cartridge carrier in position therein . in order to close the dispenser housing the dispenser cap 64 is secured to the female threads 62 in the dispenser housing head 62 though male threads 64 c thereon . a sealing member such an is o - ring located beneath lip 64 b to prevents fluids from escaping therepast . accordingly , a feature of the present invention is that the dispenser housing can be assembled in situ and secured to a fluid circulation system either in the field or as part of a manufacturing process through the steps of forming a hole in a panel , inserting a dispenser housing head therein , securing the dispenser housing head with a lock nut , securing the dispenser housing to the dispenser housing head while the dispenser housing head is secured to the panel . if a locking system for the cartridge carriers is required a locking collar can be secured to dispenser housing from above the panel 70 . to close off the system a dispenser cap can be rotatable secured into the dispenser housing head to prevent leakage . a feature of the present invention is that it can be incorporated into a fluid system either during the manufacture of the system or as an after market item . fig1 shows an exploded view of the dispenser housing proximate a panel on a water system and fig6 – 10 show individual components of an embodiment of the present invention . fig1 shows a partial top view of the cartridge carrier 50 that includes a handle 51 and a cylindrical body having a first tab 56 and a second tab 56 for forming locking engagement with the locking cam collar 65 ( fig1 ). fig1 shows a cross sectional view of housing 61 with a cartridge carrier 50 and a cartridge dispenser 40 coaxially positioned therein . a circumferential positioned port 61 b directs the fluid between the peripheral surface 61 g and the inner cartridge carrier 50 and cartridge dispenser 40 . the introduction of the fluid circumferentially induces a downward vertical flow between upper entry port 61 b and lower discharge port 61 c . the arrows indicate the general circular flow around the dispenser housing 61 and dispenser cartridge 42 to allow the dispersant to be dispersed into the fluid in the container 10 . it has been found that by introducing fluid tangentially one can produce a stable uniform flow pattern , i . e . the fluid flows uniformly past the openings 46 and 41 a even if the flow rates are changed . by maintaining a stable flow pattern past the openings 46 and 41 a it allows one to predictably control the dispersant rate by changing the flow rate . that is , the faster the flow rate past the cartridge 40 the greater the dispersant rate and conversely the slower the flow rate the slower the dispersant rate . a feature of the present invention is that not only can one predicable determine the dispersant rate by changing the flow rate but it has been found that as the number of openings are made available in the cartridge dispenser the concentration of the dispersant in the housing increases in a predictable manner . fig1 illustrates the concentration of the dispersant on the ordinate axis and with time on the abscissa axis . three different curves 80 , 81 , and 82 are shown to illustrate the dispersant rate under different size access areas in the dispersant cartridges . that is , curve 80 is the dispersant level as a function of time for a first number of access openings in cartridge 40 , the curve 81 is the dispersant level as a function of time for a larger number of access opening in cartridge 40 and curve 82 is the dispersant level as a function of time for a yet larger number of access opening in cartridge 40 . thus one way to control the amount of dispersant is to increase the area of the openings into the dispersant cartridge . in still another method one can increase the flow rate through the dispersant housing which also results in an increased dispersant level . while it is not fully understood it is believed that use of a circumferential input eliminates instability in flow patterns that can occur when fluid streams impinge on objects . as a result if the flow pattern remains stable one can uniformly increase or decrease the flow rate to correspondingly increase or decrease the dispersant rate . fig1 shows a portion of a fluid circulation system 99 for a fluid container such as found in spas , hot tubs , jetted bath tubs or swimming pools and the like . the fluid circulation system includes a fluid inlet 101 and a fluid outlet 102 located in a housing 100 having a chamber 110 therein . a cylindrical dispensing drawer 104 is slidable mounted in cylindrical chamber 110 in housing 110 with dispensing drawer 104 having a dispensing compartment 115 for holding a dispensable material 117 . located on the exterior surface of dispensing drawer 104 is a set of elastomer sealing members 105 , 106 and 107 for maintaining the dispensing drawer 104 and the housing 100 in a sealed condition with respect to one anther to prevent fluid flow past the dispensing drawer when the dispensing drawer is in an either an open or closed condition . fig1 shows the dispensing drawer 104 in the closed condition . in the closed condition a fluid or liquid , such as water , enters fluid inlet 101 and flows into chamber 115 , through the dispersal material 117 in chamber 115 and out the end of drawer 104 through a one way flap valve 118 . in this condition fluid circulates through the chamber 115 to enable the dispensing material therein to be dispensed into the fluid stream in response to the fluid flowing through the dispensing drawer 104 . fig1 shows the dispensing drawer 104 as the dispensing drawer is pulled partially outward from chamber 110 . in this condition the one way valve 118 closes and fluid flows from inlet 101 into fluid outlet 102 but is prevent from flowing into the dispensing chamber 115 in dispensing drawer 104 by the sealing member 107 engaging fluid outlet 102 . fig1 a shows an end view of dispensing drawer 104 with the one way flap valve 118 extending over openings 104 a , shown as dashed lines , to seal the openings 104 a . the top portion 118 a of flap valve is secured to drawer 104 to permit flap 118 to flex in a cantilevered fashion so that fluid can flow out of drawer 104 when fluid enter through top port 104 b . flap valve 118 is preferably a resilient material such as an elastomer . fig1 shows the dispensing drawer 104 in the open condition . in the open condition one can place a fresh charge of dispensable material in the dispensing compartment 115 . as can be seen in fig1 fluid bypass drawer 104 is held within housing 102 by a stop 120 comprising a flexible chain that has one end secured to drawer plate 109 and the other secured to housing 100 . stop 120 prevents the dispensing drawer 104 from being forced out of chamber 102 in the event the fluid in chamber 110 remains under pressure . when the dispensing drawer 104 is in an open condition the dispensing material 117 a is placed in chamber 115 . the dispersant drawer 104 is then pushed in to a closed condition wherein the dispensing material therein can be dispensed into the fluid circulation system as illustrated in fig1 . thus in the embodiment of fig1 – 17 one can quickly reposition spent dispersant by pulling out a dispensing drawer , placing the dispersant in the drawer and then closing the drawer . the dispensing drawer can be mounted on either a high pressure side of a fluid circulation system or a low pressure side of a fluid circulation system . fig1 shows a dispensing drawer 141 , which is mounted in a low pressure portion of the system . drawer 141 can be pulled out to allow a dispersant to be placed in the drawer 141 and the dispensing drawer than closed to allow the dispersant material to be dispersed into the system . fig1 also shows a partial view of a fluid system 130 having a pump 131 for circulating fluid from container 133 into inlet 132 and then directing the fluid through a outlet 132 into a drawer housing 140 which cause the fluid to flow through the dispensing drawer 141 and into a spill or return conduit 142 which delivers the fluid into container 133 . the fluid interface between the atmosphere and the liquid is identified by reference numeral 135 . the embodiments of fig1 and fig1 are extremely user friendly . that is practically everyone is familiar with the operation of a drawer and the placement of articles in the drawer . consequently , a user can periodically replenish the dispersant material by merely opening a drawer , placing the dispersant material in the drawer and closing the dispensing drawer . fig1 shows a perspective view of a slidable dispensing drawer 141 for use in the embodiment of fig1 . dispensing drawer 141 includes a set of lateral extension members 142 , 143 , 144 and 145 extending upward from a bottom member 147 to form an open top compartment . bottom member 147 has a plurality of openings 147 a therein to permit flow of fluid therethrough . a front member 149 and a rear member 150 complete the compartment for holding the dispensing material therein . a handle 153 allows one to pull dispensing drawer from the fluid system housing 130 much like one opens a conventional sliding drawer . once dispensing drawer 149 is open , the user can place dispensable materiel in the dispensing drawer 141 much like one places an article in a drawer . in order to prevent withdrawal of the dispensing drawer when the pump is operating a limit switch ( not shown ) can be connected to the drawer so that when the drawer is pulled outward the power to the pump 131 is shut off thereby prevent flow of fluid into the dispensing drawer or a bypass can be used to divert the fluid back into the container fig2 shows an example of a type of dispensing cartridge 156 that can be used with the present invention . cartridge 156 includes a set of openings 157 to permit fluid access to the contents 158 therein , which can typically be an ion yielding material such as silver chloride or the like . fig2 shows that other dispensable materials such as a solid bromine stick 160 can be placed in the dispensing drawer 150 . fig2 shows the sectional view taken along lines 5 — 5 to show the compartments 161 , 162 and 163 located behind front panel 149 to show the compartments with the upright extension for confining the dispensable material . therein . thus the dispensing drawers of fig1 – 22 disclose a user friendly method of adding dispersant to a fluid system such as a hot tub , spa , jetted bath tub , swimming pool or the like wherein the user merely pulls out a drawer and drops the dispersant into the drawer and then closes the drawer . in one embodiment the drawer can be placed in the pressurized fluid circulation system without shutting down the system and in the other embodiment the system can be automatically shut down as the drawer is opened to prevent fluid from escaping . fig2 shows a partial sectional view of an alternate embodiment of a dispensing member for use in fluid systems including spas , hot tubs , jetted bath tubs swimming pools and the like . in the embodiment shown the system 170 includes a container 171 with a fluid 169 therein . the fluid is directed upward through conduit 172 into a funnel shaped member 174 that directs the fluid through a porous member 173 that permits fluid to flow therethrough but prevents the dispensing material 166 , 167 , and 168 from falling through . in operation of the system 170 the fluid flows upward like a fountain and flows gently around or through the dispersant to bring the dispersant into the body of fluid . the path of the fluid is indicted by the arrows . in the embodiment shown a cover 176 is hinged over the top of the fountain like dispenser to isolate the dispensing unit form contact . however , in an alternate embodiment the cover 176 need not be used to enable the dispersant to be readily accessible . in this embodiment one can readily observe the condition of dispersant in the system and can replenish the dispersant when the dispersant is spent or in a low condition . thus , the embodiment of fig2 includes a method of replenishing a dispersant in a spa , hot tub , jetted bath tub or pool therein comprising the steps of directing a liquid through a fountain with a tray 173 having a spill chute 173 a for returning the liquid to a body of recreation liquid 169 under the influence of gravity ; and placing a fresh charge of dispersant such as dispersant 166 , in the tray 173 to allow the liquid to flow over the charge of dispersant 166 , 167 or 168 to thereby carry the dispersant into the body of recreational liquid 169 . fig2 and fig2 show hanging dispenser 200 comprising a support member 201 having a top member 201 a with a lip 201 b for engaging a portion 210 such as a side wall of a fluid system . in the embodiment shown the top member 201 a is located above a fluid line such as liquid gas interface 202 with a dispenser housing 203 carried by member 201 having a compartment 214 herein for receiving a dispersant material located below the fluid line 202 to permit the fluid in the system to come into contact with the dispensable material therein . a pivotal lid 212 can be placed on top of the dispenser housing 202 to enable a user to quickly place a dispersing cartridge , bulk dispersant material or dispenser cartridges in the compartment 214 in the dispersant housing . in the embodiment shown the dispenser housing 203 includes a plurality of openings 207 therein to permit ingress and egress of fluid therethrough . the dispenser housing is shown in fig2 with two dispensing cartridges 205 , 206 located in the compartment 214 in housing . an example of a dispensing cartridge 205 or 206 is the dispensing article 40 shown in fig1 . in operation of the hanging dispenser of the top member 201 a extends laterally from member 201 to engage a ledge 210 a on a fluid container in the system with the top member 201 a including a ridge or lip 201 b to prevent the top member 201 a from accidentally slipping off the ledge 210 a . thus the present invention includes the method of replenishing a dispersant in a spa , hot tub , jetted bath tub or pool therein comprising : removing a cover located above a water line in a container of recreational water ; placing a charge of dispersant in a liquid line ; and placing the cover on the liquid line to thereby enable the dispersant to be delivered to the recreational water in the container to render the recreational water suitable for body immersion . the present invention also includes the method of replenishing a dispersant in a spa , hot tub , jetted bath tub or pool therein comprising sliding a drawer having an open chamber normally positioned in a liquid media at least partially out of a drawer housing located in a fluid circulation system ; placing a fresh charge of dispersant in the drawer ; and closing the drawer to permit the dispersant to be carried into the liquid media .