Hi, I just bought a clownfish two hours ago from petco and recently put him in my tank. When I got him into the tank I noticed that his fins looked a little deteriorated. At petco he was in a larger tank with 2 other clownfish and a cleaner shrimp. I was wondering if someone knew what is wrong with him and what I can do to help. (Also my tank is fully cycled and I used the fish less method)