Anyone ever have a whitish circular 3/32 nd size growth under the jaw of a Calvus.Stumps me, tank has been well taken care of regular 7-10 day water changes,cleaned gravel 10 days ago and filters are cleaned every water change. I did add 3 punks to the tank but they were healthy in another tank and had been in the 125 gal Calvus tank before.He seems stressed and others are picking on him. There are approx 20 comps and calvus in the tank and have been together for at least a year.I've never seen this before and I don't know what to treat with? Thanks for any comments