I'm worried about my betta, I got him a few months ago, aprouching a year, and hes been doing fine, until recently,hes been flaoting at the top, and when i tap the tank to see if hes alive, he swims for a while, but when i check on him again, he's either floating at the top again, or at the bottom, just laying there, he doesnt flare no more and barely moves, and things turned for the worste when I came home to find him stuck to the filter, I freed him but he has a huge slit going down his rear tail. Just now I found him stuck to it again. Is he ill? And if so, what can be done? He's in an a pretty big tank, with him alone, Filtered and heater.
Thanks.
Thanks.