I think my fish has popeye, all water quality readings are good. Nitrates only 5.0. I have a heniacus butterfly fish. He has one eye that is puffed up but is acting fine and eating fine. I have also noticed some white in his black stripes, it doesn't look like a parasite i dont think but it just looks like the white is bleeding through the black stripes. Anyone got any words of wisdom or knowledge they can spread to me??