I decided to rescue this particular betta from the pet shop, he was the only one left and no one wanted him..so..I took him home. I've got other kinds of fish, but this is my first betta. I know he's sick from the way he acts - I thought it was swim bladder because he stays at the bottom and he'll occasionally float but doesn't swim and is not active. However, upon closer examination, I find that on one side of him he's got a white spot and some kind of growth(?) on his underbelly. He could also have a very mild case of fin rot because there are a couple little pinholes in his fins. Also, he hasn't eaten anything since I brought him home - I tried a bit of flake food and a piece of thawed pea, but he doesn't want it.
Right now, I've got him alone in a cycled 2.5 gallon tank with filtration, mini heater, and air pump. I've also added some salt.
Poor Moe..What do you think I should do???