My Beta fish is sick. He has some sort of bacterial infection that causes his fins to stick together. I called Petsmart. Guess what, they are not Pet Smart! If I hadn't called a local tropical fish store, and just taken Petsmart's word on what to do for poor Gilbert, he would probably die within a few days. The lady at the fish store told me to wrap a towel around his tank at night and to put aquarium salt in his water as well. That's all he needs! Petsmart told me to buy something called Betafix which turns out to be completely worthless!
I'm glad I found this out sooner than later. My sad little fish has been rather listless and skittish lately. I would be too if I had some sort of evil bacteria eating my fins. Poor Gilbert!