I had African clawed frogs and loved them! They will eat every fish in your tank so the must be housed separately. They eat live fish such as guppies and mosquito fish. Do not feed them goldfish or rosey Minos , Roseys are a kind of gold fish. This will cause a vitamin C diffissioncy in the frogs. Yes they do eat the smaller frogs too. So u need your frogs to be roughly the same size. Females get larger than males. When breeding the adults must be removed from the tank or they will eat the tadpoles. So, your better off either getting females or males if u don't want to breed. They eat shrimp pellets, blood worms, live fish and anything else. They also like thawed frozen beef hearts. They are noise sensitive. Some people recommend no filters but they are dirty. I use a canister filter, a sunsun four tray with a spray bar they seem not to be bothered by it. You will have to do some partial water changes to remove ammonia. They don't like high ammonia levels and produce alot. I recommend sand not pebbles. Also make plenty of hiding places. I recommend live plants but silk plants work too. No plastic plants. They rip webbing in their feet.