I recently got a wrasse from the lfs and put it in qt. He's been doing great, until, today. He's laying on his side breathing faster than normal, but his tail looks all chewed up! Nothing else is in the tank w him except some small hermits and snails. The qt has been set up for years. I recently had a wrasse jump so I got another one to quarantine until ready for the display. I also put a top on (oops). Idk whats wrong w this guy!