I have 2 silver angelfish and one isn't eating. At one point both of them weren't eating then I did a water change and one started eating again however this one almost since I got him just hangs in one corner or another rarely moving to far about i've checked to see if he has any signs of disease or parasites and doesn't seem to have any. I also check the water and there's nothing wrong with nitrates nitrites ammonia alkalinity pH hardness etc and i'm just stumped at whats causing him put not the other angel to continue his hunger strike he's gone over a week with out eating