I just received my koran angelfish I ordered online along with other fish this morning, his color is flaking away and his eyes are cloudyish like there is a water buildup behind the first layer. I added some melafix to the tank I put him I'm as he is in there by himself. Can anybody give me any insight as to what else I can do or what may be causing these problems. I've ordered many fish online and none looked like this so I am guessing it is not just stress. I'd rather not send a sick fish back for him just to suffer and die, I'd rather get him better if possible. Thanks for your help.