I added a few new fish without quarantining and all my fish got ich. I treated the display tank and cured that. Then a few weeks afterwards 1 fish had 1 cloudy eyes. Now 2 fish have both eyes cloudy. I have almost 30 fish in the tank(not all rainbows) and none of them have cloudy eyes. So im not sure if its aftermath of the ich parasites. But my water quality is good i test 4 or 5 times a week, every week. And do 50% water changes every week.0 ammonia 0 nitrite and nitrate never gets over 40. I feed nothing but extreme flake and frozen foods all high quality. Im not sure what the cause is but most things i read say treat cloudy eyes with antibacterial so i figured i would start there. Just dont know if i can afford to treat the display if its gonna take multiple rounds. But i could afford to remove the 2 fish and treat them with multiple rounds. Just not sure which is the best way to proceed.