Hi started a tank then gave up. In 2012 started it back seeing my 18 month old loves fish. Thing same as last time. 90 gal. Fish are dying and and snails. I now have a toadstool green and a green flower pot and a red metershower . Everything I test is good and the store. The flower pot has not come out in 72 hours. Have lost a bleeny and a coral beauty in the last week alk 10.21 ph 8.3 and all other are 0.