PLEASE HELP ME! My betta fish who I've had for less than a day seems to be very sick. He is very bloated and falls to the side a lot, as if he can't keep balance. I suspect internal parasites, but I don't know. He seemed absolutely fine yesterday. This is so frustrating to me because this is my third betta, and none of the others have lived more than a week. He's in a completely clean three gallon tank with a heater and a filter. I've spent so much time and money on these beautiful little guys, I just don't know what to do!