My fish LOVE them and I have a LOT........is every other day cool or should I cut them back? Are they just pure protein or do they have bad stuff in them too? Do you drop them in frozen or thaw them before opening? At what point is it futile to feed them because bigger ones eat a whole cube in ONE BITE? Are live bloodworms from the tackle shop safe or even better to feed them? Are there other frozen foods that should only be given in limited quantities (I heard something about beefheart) ???