I know Bala sharks are only supposed to be about 10" or 12" but my friend has one in a 250g tank that is a foot and a half. He feeds is home raised guppies and goldfish as well as flaked foods and bloodworms. He also feeds it "the secret recipe" of stuff he makes himself. It's incredible! Why is it so big? Could it be the tank size? or the stuff he eats? He is in there with 4 other bala sharks that are about 8" to 10" each. He plans on getting them an even bigger tank! I wonder why its so huge??