proof of concept: if you have a ten gallon thats well set up and has a bio filter going, you could keep a baby bass in a 10 gallon, though its not adviced, i kept mine in a 10 untill he was about 2 inches but i dont advise you to do so b/c he had verry little room and i no other tank b/c i just started with aquariums. with food, use small gups thats wat mine ate, try frozen krill too