I've heard bloodworms are worthless, yet I know many folks feed them to fish. I fed my male grammode a whole cube today and it is the only time I've seen his belly full. I always soak the bloodworms in Kent Zoe freshwater prior to feeding. He may get a cube once or twice a week. He gets Hikari Sinking Carnivore and NLS Large Fish pellets daily (but only like a pellet of each a day as he eats very little). Those bloodworms he eats with a vengeance.