[harif87]

All that explination makes me lean more to the idea that it wasnt cause by any disease rather i think he simply bruised his eyes. It could have happened when you were netting him out or it would have happened when you werent looking. Popeye wont kill your fish, its justa condition not a disease. On the other hand popeye can cause a fish to go blind in some cases if he hit himself really hard in which case he would go blind and die of starvation since he wouldnt be able to see the food. Also popeye can be an indicator of a bacterial or fungal disease inside the fish. But i dont think this is the case since your water stats are good. Just watch for abrnormal eating patterns or swimming patterns (or lack of swimming patterns) or anythign out of the ordinary. If you do those might be signs of a disease accompanies by the condition of popeye