Ok, I got my devel lionfish (3 inches) for two weeks now in a 20gals, his eyes slowly starting to get cloudy. As a matter of fact, his left eye is almost competely cover with cloudness. I read some websites and they claimed that this is due to the decline of water quality and it could successfully be treated with anitibotic regimen(don't know what this medicine is). I don't have the ability to setup a quartine tank and looking for medicine as a alternative because I have some corals in my tank. I do have some reef safe medicine called "Prevent Ich" by kordon, but they proved to me uneffective, in fact, they increase the infection. Any ideas on specific brands that are reef safe and effective?? Or any advices will help.