i gotmy catfish at about 3 inches...he lovedddd krill and wuld eat it all the time....then he got tired of that and only ate shrimp...hates shrimp now and only eats beefheart...i dont like feedin beef heart cuz it dirtys the tank so much.....any perfect food my red tail will love to death that aint so messy and is big for him( hes about 8 inches)... doesnt eat pellets either!...