Need some help. The other day I overdosed vodka to the tank and had a 2 day sever bacterial bloom. Did 3 medium sized water changes and had no looses. I noticed my lawn mower blenny acting strange after that and he had what appeared to be a red mark on him near his tail fin. Today I noticed that mark is much bigger and he isn’t swimmer right and is breathing heavy. I don’t think he’s going to make it through the night was just wondering if anyone has seen this before ?