Yesterday night I got 2 green cromis for my 29 gallon biocube. My cycle is done. They first were really timid but now are starting to get more active. But only one of the fish is eating. I'm feeding mysis shrimp. Also they both are opening and closing there mouths really quickly but are not on the surface of the water. I'm worried that there is something wrong with them. Yesterday my water parameters were Ammonia 0 Nittite 0 Nitrate 5. Today it is Ammonia 0 Nitrite .25 Nitrate 6. Also the PH is 8.2. My water had been cycled in the last 11 days. The one that is not eating is not in hiding but the one that is eating is hiding under the rocks while coming out quickly for food and back in. This picture is of the fish that's not eating. Should I do a water change.