So i have 3 betas all in little tanks and one is like floating on top breathing and is alive but hes like kind of on his side but he moves when u bump the tank but then its like he has too much air and just comes to the top no mater how much he tries to go to the bottom....Does anyone know whats wrong with him....Is he dying......I just got him and the other 2 fish are in the same kind of tanks and set ups but they are perfectly fine.....I even have thats tank clearer stuff and i changed all the water when i saw the one fish.....please help hes my favorite of the 3 and i want him to live.