I have recently used ultra life red slime remover. Then I cleaned the substrate which is crushed coral. I have a 90 gallon tank. I also did a partial water change. I noticed that my anenome was shrinking into a little ball so I checked the chemicals in the water. Now I have 1 to 2 ppm in amonia and my Nitrite levels are really high. the fish look fine. What can I do. I am doing water changes and added some stress zyme to try to get ride of the amonia in the tank. Is there something I am missing I am new to this hobby. my tank is about 4 months old.