One of my neighbors put in in our yard near the sidewalk. Naturally, being a growing fish keeper and having just seen Finding Dory just before I saw it, I took it inside. It had a "Free Hamster Cage" sign on it, but I want to use it for fish. I plan to sterilize it with some Hydrogen Peroxide or bleach solution before I use it. It will either go towards a new hamster or some fish. If it goes towards fish, what should i do with it? I wanna try multis- cichlids as they need 10g for 2, some other fish, 2 male betas in a divided tank, a dwarf puffer, or... I have 5 skirt tetras, 3 female betas, and 3 ottos in a 20g high tank. The tetras and betas have had a difficult time getting along. IE fighting with each other when they're hungry. So... split up the fish + new inhabitants for each, or some new fish?