I have a 20 gallon long fish tank. It has 3 clawed frogs, a pleco, and 1 powder blue gourami. I've added other fish such as catfish, a baby oscar, and a puffer fish but all of those have died. I finally got the water levels under control now I want to add a few more fish. This is my first gourami, and I feel bad because he is by himself. Any info on their personalities, and what other fish I can add, would be greatly appreciated. They will all be moved to another larger tank in the future also, so I'm not worried about space.