Ok, Casanova's going bizzerk! I moved him to his new home (3 gallons) from the community which became a sorority. This morning I thought he was dying because he was laying on the bottom, hardly breathing. But now he looks fine, except for one thing. THERE ARE ENORMOUS RIPS IN HIS TAIL!! They have a little red on the end where they were ripped... I'm SUPER worried!!! Is he a tail biter???? I checked over the whole tank, theres nothing he could have ripped them on!!! It's impossible!!! Plus his bottom fin looks discolored!! I'll add pics in a sec!! HELP! If he is tail biting, how do I stop it??