I recently purchased 2 new bettas from my lps. I got each a 1 gallon aquarium and came home set it up put each fish in their respective new homes and the first one Bert is doing great. A beautiful sherbet colored fish (hence the name). The other Ernie has had a bad go of it. He up until 2 days ago had not eaten. On Sunday his color started going from a dark blue to a greenish white so I knew he was in trouble. I took all of the ornaments out of the tank, cleaned it really well, added a small heater and some penicillin that I got from another lps ( couldn't find any betta max). He still is not moving very much around the tank but has been eating some bloodworms that I gave to him. Is there anything else that I can do for this fish to make sure he survives. I think that he has a case of fin rot, but I can't be sure.