 The 9 @,@ 423 @-@ square @-@ foot ( 875 @.@ 4 m2 ) pool used 3 by 3 feet ( 0 @.@ 91 by 0 @.@ 91 m ) pavers that weigh 250 pounds ( 110 kg ) . The pavers were rested on screw jack pedestals in order to be leveled and shimmed . The pavers had to be perfectly leveled for the water to work correctly because the fountain incorporates numerous sensors to regulate the flow and level of the water . 
 The 9 @,@ 423 @-@ square @-@ foot ( 875 @.@ 4 m2 ) pool used 3 by 3 feet ( 0 @.@ 91 by 0 @.@ 91 m ) pavers <a href='null_relcl' title='1'><mark>that</mark></a>weigh 250 pounds ( 110 kg ) . The pavers <a href='uninflect' title='2'><mark>were</mark></a> rested on screw jack pedestals in order to be leveled and shimmed . The pavers had to be perfectly leveled for the water to work correctly because the fountain <a href='uninflect' title='3'><mark>incorporates</mark></a> numerous sensors to regulate the flow and level of the water . 
The 9 @,@ 423 @-@ square @-@ foot ( 875 @.@ 4 m2 ) pool used 3 by 3 feet ( 0 @.@ 91 by 0 @.@ 91 m ) pavers weigh 250 pounds ( 110 kg ) . da pavers was rested on screw jack pedestals in order to b leveled and shimmed . The pavers had to bbperfectly leveled fa the water to wrk correctly because the fountain incorporate numerous sensors to regulate tdaflow and level of the water .