Yup, Supernova took a small chunk out of it about a month ago or so, but it wasn't damaged to this extent of course. It was one bite mark in the middle about half way through his tail....almost like he wanted to be a Doubletail
And it had been like that and healing nicely for the past month, but then suddenly half of his entire tail was gone and shredded a few hours after a PWC. :S The tank is cycled and the only residents were him and Supernova, only thing I changed was a moved one of the live plants a little bit to keep it burried and scrubbed some algae off.....I'm not sure what could have stressed him. Hes acting normally, eating, doesn't appear stressed or shy....I'm stumped.
Though, talked my mom into taking me to get some medicine for him this week....so hopefully it'll only be a few days until I can get it.