I currently only have 2 pbass in my tank. All my water parameters are perfect and have been thar way for a long time. Ph is kinda high but it's always been that way. One of the pbass is eating like crazy and the other one looks hungry and will hit the food but then he spits. It's been about a week and he is giving up on hit the food. They are about 7 inches long. I feed them market shrip and have been for months. But sometime I give them feeders every now and then. I think he might be sick any ideas?