Last week i picked up a new L240 vamp pleco and its the first pleco ive ever owned. It seemed fine and healthy but yesterday i noticed it started to look like his fins were torn and falling apart a little bit! The only other tank mates are two 1.5" clown loaches and the plec is about 6". Now today all of his fins look terrible they are all receiding they look like they are burning off!! I have done two huge water changes what is wrong what should i do! thanks for any help