Ammonia, nitrite and nitrate are all down within acceptable levels. PH is the only thing thats off, its down around 5.0. I've been gradually working on improving it without any sudden shocks. Maintaining stable PH has been a problem since day 1 but in three years it has never seemed to bother him so no real changes there. It's a 50 gallon tank, no other fish. He has the thing to himself, he's about 11-11.5 inches long. Because he's so large I do water changes daily of about 5% everytime. Filtration is a little lacking, he has an Aquaclear 200, hence my consistent water changes to make sure everything stays in check.
Food seems to be the most likely culprit for the bloating. For a while all he would eat was freeze dried shrimp. When I first noticed bloating back in June I took him off those and began a mixture of frozen brine shrimp, cichlid pellets and the occasional shrimp. I starved him for a week and he refused to eat green peas.
The bloating has stayed about the same for about two months now and he has been acting normal. In the last week the bloating has gotten worse, his stomach is quite distended now. Its just today that he's really worrying me. He went back to the bottom for a bit and now he's in the corned at the top again. I'm not sure what I can do.