referring to fig1 and 2 , the water treatment apparatus is generally designated by reference numeral 10 . the apparatus comprises a base 12 , removable treatment carafe 14 and housing 18 . housing 18 may be of any particular design and may contain any required sensing equipment , water filters , pumps and the like . housing 18 is preferably connectable in flow communication with treatment carafe 14 such that treated water may be dispensed from dispenser 20 after the completion of the treatment cycle of the water in treatment carafe 14 . as shown in fig2 a treated water carafe 16 may be positioned underneath dispenser 20 for receiving the treated water . the shape and configuration of treatment carafe 14 and treated water carafe 16 may be of any particular design which is aesthetically pleasing . as shown in particular in fig3 and 5 , treatment carafe 14 has a top 22 , side walls 24 and a bottom 26 . optionally , as shown in fig1 and 2 , a handle 28 may be provided to allow the user to manipulate carafe 14 . carafe 14 is designed to be filled with a liquid which is to be treated . in particular , it is preferred that the liquid is water . carafe 14 is removably mounted to base 12 . accordingly , when the user wishes to treat water , the user may be move carafe 14 , e . g . by means of handle 18 . the top 22 of carafe 14 may be placed underneath a source of water ( e . g . a kitchen tap ) and the tap may be turned on to allow the carafe to be filled . once filled , carafe 14 may then be placed on base 12 . in one preferred embodiment of this invention , in order to simplify the filling operation , top 22 is provided with a recess 30 . the upper portion of carafe 14 is provided with at least one , but preferably a plurality of water inlet ports 32 in recess 30 . recess 30 may be of any particular configuration which provides an open area in which the water to be treated may be poured so that it may drain into carafe 14 through water inlet ports 32 . accordingly , as shown in fig5 recess 30 may be funnel shaped . for example , the upper portion of cavity 14 has an upper surface 34 . a portion of upper surface 34 may comprise sloped portion 36 which extends downwardly towards the centre of carafe 30 . by designing carafe 40 with a recess 32 containing water inlet ports 32 , the user need not remove a lid from carafe 14 so as to fill it . it will be appreciated that the automatic sealing mechanism and the automatic gas conduit connection feature of this invention may be designed to work regardless of the shape of the top of carafe 14 . for example , the top of carafe 14 may be flat and that inlet ports 32 may be provided in the flat top ( not shown ). the creation of a recess provides a funnel to reduce or prevent spillage during the filling operation . the water in treatment carafe 14 is treated with an oxidizing gas . the oxidizing gas is preferably ozone . however , other oxidizing gases such as hydrogen peroxide are known . the remaining description is based upon a preferred embodiment in which the oxidizing gas is ozone . when the treatment cycle is commenced , ozone is introduced into carafe 14 . in the preferred embodiment , carafe 14 is provided with an annular sparger 38 which has a plurality of openings in the surface thereof . sparger 38 is connected to a supply port 40 . supply port 40 has an associated valve 42 . base 12 is provided with a supply conduit 44 which is seated immediately below valve 42 . supply conduit 44 is in air flow communication with a source of ozone . for example , an air pump may be positioned upstream of supply conduit 44 so as to feed air to an ozone generator which in turn provides a feed supply of ozone to supply conduit 44 . the air pump and the ozone generator may be provided in one of the housings 18 . electricity to run the electronics of the unit , including the air pump and the ozone generator , may be supplied by means of electric cord 46 ( see fig2 ). valve 42 is movable between an open position and a closed position . when valve 42 is in the closed position , sparger 38 is sealed . accordingly , as water is introduced into carafe 14 , water will not drain through supply port 40 . when valve 42 is in the open position , ozone may be supplied via conduit 44 , through port 40 into sparger 38 . valve 42 may be moved from the closed position to the open position by means of the force of ozone containing air passing through conduit 44 . it is to be appreciated that valve 42 may be biased to the closed position by gravity , a spring or the like . treated water may be decanted from carafe 14 by any means known in the art . accordingly , carafe 14 could be removed from base 12 and the water decanted such as by means of a spout or the like . preferably , the treated water is decanted from carafe 14 while carafe 14 is positioned on base 12 . to this end , a water exit port 48 may be provided in bottom 26 ( see fig3 ). a valve 50 is provided in water exit port 48 . at the end of a cycle , valve 50 may be actuated , for example , by the means of solenoid 52 . when solenoid 52 is actuated , linkage 54 , moved engagement member 56 upwardly . this movement displaces engagement member 56 upwardly so as to move displacer rod 58 upwardly . the upward movement of displacer rod 58 moves valve 50 to the open position allowing the treated water to exit through water exit port 48 . water exit port 48 may be in flow communication with a water pump so as to pump the treated water through a filter 108 ( e . g . a carbon block filter ) which may be located in housing 18 and from there through dispenser 20 to , e . g . a glass or treated water carafe 16 . filter 108 preferably has pores which are less than 50μ , preferably less than 10μ and more preferably less than 1μ is size . carafe 14 may be provided with a fill line 60 so as to indicate to the user the portion of carafe 14 which should be filled with water to be treated . fill line 60 may be provided at any location in carafe 14 provided a chamber or the like which acts as an off gas receiving means is provided above fill line 60 for receiving off gases . the top of carafe 14 may be flat if the carafe is not filled to the top . alternately , the top of carafe 14 may be angled so as to direct the off gas to a particular location , head gas space 62 . in the embodiment of fig3 and 5 , the top of carafe 14 has an angled top to create an annular head gas space 62 in which the off gas may accumulate . during the treatment of water in carafe 14 , ozone is bubbled through the water by means of sparger 38 . the off gases accumulate above the water ( e . g . above fill line 60 ) in head gas space 62 . ozone may cause side effects in people exposed to sufficient quantities of these gases ( e . g . headaches ). accordingly , the off gases are preferably collected and treated ( e . g . by exposing them to a destructor which will convert the gas to a more benign form ). for example , in the case of ozone , the destructor may be a catalyst for converting ozone to oxygen such as one or more of manganese dioxide , titanium dioxide , iron oxide and carbon . contact between ozone and one or more of these catalyses will case the ozone to convert to oxygen which may then be released harmlessly from the system . accordingly , in one preferred embodiment , carafe 14 includes a gas conduit having a first end in fluid flow communication with head gas space 62 and a second end which is connected in fluid flow communication with an off gas treatment member ( e . g . a destructor ) when carafe 14 is placed on base 12 and apparatus 10 is actuated to treat water in carafe 14 . referring to fig5 carafe 14 is provided with a support rod 64 having an arm 66 . arm 66 has an upper end 68 positioned in head gas space 62 when apparatus 10 is operational . support rod 64 and arm 66 are hollow so as to define a passage 70 extending from head gas space 62 through bottom 26 of carafe 14 . support rod 64 is provided with an end portion 72 which is connectable in air flow communication with off gas conduit 74 . off gas conduit 74 is in air flow communication with off gas treatment member 76 . off gas treatment member 76 may optionally be positioned in one of the housings 18 . off gas treatment member 76 may be a destructor for catalytically converting the ozone to a benign gas . alternately , it may be an off gas sensor , eg . so as to monitor the concentration of ozone in the off gas and provide feed back to the system so as to control the batch cycle . alternately , a destructor and a sensor may be provided downstream of off gas conduit 74 . preferably , upper end 68 is positioned above water inlet ports 32 so that , when the unit is filled , water will not enter into passage 70 . it will also be appreciated that by placing upper end 68 to one side of carafe 14 ( e . g . spaced from water inlet ports 32 ) that water will tend not to enter passage 70 as carafe 14 is filled . it will also be appreciated that upper end 68 may be configured so as to inhibit the entry of water regardless of the position of upper end 68 with respect to water inlet ports 32 . as upper end 68 is positioned and / or configured so as not to allow water to enter passage 70 there through , end portion 72 need not include a valve member to seal passage 70 . accordingly , as shown in fig5 end portion 72 may be opened when carafe 14 is removed from base 12 . referring to fig4 base 12 is shown having a generally horizontal upper surface 78 . upper surface 78 is configured so as to allow bottom 26 to be seated thereon . the seating of bottom 26 on upper surface 78 is shown in detail in fig3 . as shown in fig4 three openings are provided in upper surface 78 . the first is the upper end of supply conduit 44 which is engaged with supply port 40 when carafe 14 is placed on base 12 . the second is the top of water outlet conduit 80 which receives treated water when valve 50 is opened . the third is the upper end of off gas conduit 74 . end portion 72 engages the upper end of off gas conduit 74 when carafe 14 is placed on base 12 . accordingly , it will be understood that one advantage of the instant invention is that head gas space 62 is automatically in communication with off gas conduit 74 by placing carafe 14 on base 12 . the user need not make any connections between the carafe and an off gas treatment conduit . accordingly , ozone will not be accidentally released during the operation of the unit if the consumer forgets to make a connection . further , if an off gas sensor is used to control the duration of the treatment cycle , all of the off gas will be available for passage through a sensor via conduit 74 . in accordance with another embodiment of this invention , sealing member 82 is provided for closing water inlet ports . sealing member 82 is movable between a first position in which water inlet 32 is sealed ( see fig3 ) and a second position in which the water inlet ports 32 are open ( see fig5 ). referring to fig3 when carafe 14 is placed on base 12 and is ready for a treatment cycle to begin , sealing member 32 is in the closed position . in this position , engagement surface 84 of sealing member 82 contacts engagement surface 86 of carafe 14 thereby creating a seal between water inlet 32 and the interior of carafe 14 . as shown in fig5 when carafe 14 is removed from the unit and is ready to be filled , sealing member 82 is displaced from engagement surface 86 thereby allowing water to enter through water inlet 32 into carafe 14 . a linkage , which is connected to sealing member 82 , is provided for moving sealing member 82 between the second and first positions in response to the placement of carafe 14 on base 12 . thus , when carafe 14 is placed on base 12 , carafe 14 is automatically sealed and ready for the commencement of a treatment cycle . in a preferred embodiment , sealing member 82 is provided at the upper end of support rod 64 which acts as the driving member . the engagement of end portion 72 into the upper end of off gas conduit 74 drives sealing member 82 ( which may be a resilient member which is resistant to ozone ) into engagement with engagement surface 86 . thus , end portion 72 comprises an actuating means drivingly connected to sealing member 82 and operably responsive to placement of carafe 14 on base 12 . it will be appreciated that other means may be provided for moving the sealing means . for example , handle 28 may have a trigger to open sealing member 82 when the user picks up carafe 14 . thus the user may automatically open water inlet 32 when they pick up the carafe and seal water inlet 32 when they release handle 28 . in the preferred embodiment shown in fig3 and 5 , support rod 64 ( with end portion 72 ) operates both as the actuating means as well as the gas conduit means for connecting head gas space 62 with off gas conduit 74 . it will be appreciated that different apparatus may be included in carafe 14 for performing each of these different functions . it will further be appreciated that only one of these two apparatus ( i . e . one of the actuating means and the gas conduit means ) may be provided in a carafe 14 . in order to prevent water from leaking from carafe 14 into off gas conduit 74 , a sealing member may be provided . the sealing member may comprise a water tight bushing provided in bottom 26 surrounding end portion 72 . alternately , as shown in fig3 and 5 , a diaphragm 88 may be provided . diaphragm 88 is a deformable member ( preferably a resilient member ) which may be made from any ozone resistant material . the upper portion of diaphragm 88 has an opening defining an upper perimeter 90 which surrounds the upper end of end portion 72 and forms a water tight seal therewith . the lower portion of diaphragm 88 is provided with a lower perimeter 92 which is connected to the interior of bottom 26 so as to form a water tight seal with bottom 26 . as support rod 64 moves downwardly to the open position ( see fig5 ) and then back upwardly to the sealed position ( see fig3 ) diaphragm 88 flexes downwardly and upwardly to maintain a water tight seal . support rod 64 may be designed so as to automatically move to the open position as shown in fig5 due the force of gravity when carafe 14 is removed from base 12 . alternately , a biasing member ( e . g . a spring or other resiliently deformable member ) may be provided to bias support rod 64 to the open position . the biasing member may be provided so as to interact with any portion of support rod 64 ( either upper end 96 or end portion 72 ). for example , a spring 98 may be provided around support arm 100 and upper end 96 . spring 98 exerts a downward pressure on support rod 64 at all times . accordingly , when carafe 14 is removed from base 12 , spring 98 will cause support rod 64 to move to the downward position . the weight of carafe 64 is sufficient , particularly when filled with water , to cause support rod 64 to move upwardly thereby compressing spring 98 . alternately , it will be appreciated that diaphragm 88 may be configured to bias support rod 64 to the open position . in a preferred embodiment of the instant invention , both treatment carafe 14 and treated water carafe 16 each have at least a vertical section that is at least translucent and , preferably , is transparent or substantially transparent . preferably , treatment carafe 14 and treated water carafe 16 are themselves constructed so that , in their entirety , they are at least translucent and , preferably , they are transparent or substantially transparent . accordingly , the liquid level in both treatment carafe 14 and treated water carafe 16 is visible . advantageously , by constructing at least a substantial portion of the carafe as transparent or substantially transparent , the user can view the ozonation process and can monitor the liquid level as the treated water is withdrawn from treatment carafe 14 and is received in treated water carafe 16 . referring in particular to fig6 water level 102 is visible to an observer from the exterior of treatment carafe 14 . similarly , water level 104 in treated water carafe 16 is visible from the exterior . when the dispense cycle is initiated , treated water is drawn from treatment carafe 14 via water exit port 48 . the water travels through conduit 112 to water pump 114 . the water exits water pump 114 via conduit 116 which transports it to carbon block filter 108 . the water passes through carbon block filter where residual ozone and decomposition products produced by the oxidizing action of ozone in treatment carafe 14 are removed . the filtered water is then transported via conduit 110 to dispenser 20 where the dispensed water 106 is dispensed from apparatus 10 and enters treated water carafe 16 via an opening in the upper portion thereof . as water is dispensed , the consumer visibly sees water level 102 dropping in carafe 14 and rising in treated water carafe 16 preferably at about the same rate . in particular , during dispensing , as water level 102 drops to level 102 ′, for example , water level 104 in carafe 16 increases , for example , to level 104 ′. the fact that the water level in carafe 14 is dropping at the same time and at about the same rate as the water level in carafe 16 is rising provides a consumer with a visual check that the water is passing through carbon block filter 108 . it will be appreciated , that slight differences in the rate of drop of the water level in treatment carafe 14 and the rate of rise of the water level in treated water carafe 16 will not be apparent to a user . therefore , the rate of drop of the water level in treatment carafe 14 and the rate of rise of the water level in treated water carafe 16 need not be the same . preferably , the rate of drop of the water level in treatment carafe 14 may be form 60 % to 140 % of the rate of rise of the water level in treated water carafe 16 , more preferably from 75 % to 125 % and most preferably from 85 % to 115 %. it will be appreciated that other filter media may be used in the treatment of water may be utilized . it will further be appreciated that this aspect of the invention is applicable even if carafe 14 is not removable from base 12 . preferably , apparatus 10 includes an automatic dispense button 118 ( see fig1 ). when automatic dispense button 118 is depressed , pump 114 will be automatically actuated once the treatment cycle in treatment carafe 14 is completed . preferably , auto dispense button 118 is positioned on apparatus 10 such that it is automatically depressed when carafe 16 is positioned in place beneath dispenser 20 . accordingly , when the treatment cycle is complete , the water will automatically dispense from dispenser 20 and the consumer will visually be able to monitor the transfer of water from treatment water carafe to treated water carafe 16 . it will be appreciated by those skilled in the art that various additions and modifications may be made to the instant invention and all of these are within scope of the following claims .