a GSP i recently sold to a friend took to flakes for some reason. its not like i starved them or under fed them or gave them a poor diet. i keep it varied. mine get bloodworms, squid, mussel, market shrimp, clams, krill, mysis shrimp, silversides, my GSP picks at the dried seaweed i put in for my lawnmower blenny and others that pick at it