good day all. I have had two cleaner wrass in my tank for about a month now. They have been eating shrimp and flake. A couple of days ago I lost one of them(cant find it, and it is not swimming around) lol. so i think its dead. And my question is the other one is starting to lose color in his face and its moving its way down. Its just a bla brow? any one have an idea. thanks guys.