When my best friend went back to college this fall she didn't have enough room for her betta, Kiedis. He often floats to the top of the tank (normally on the same side) but is normally fine a couple of days later. His fins look like he may have fin rot. On one hand I want to help him so he doesn't die while I'm watching him, on the other I'm worried the stuff I DO to help him may kill him. She isn't giving him betta food. I have no idea if it makes a difference, I just saw betta food while I was at Petsmart. She gives him New Life Spectrum Small Fish Formula. If anyone can help I would really appreciate it.