6" Buttikoferi in a 75g tank with a 10" pleco. 82degree water..weekly 40%water changes, two whsiper 5's, gravel no plants. vary his diet between flakes, bloodworms, earth wroms..dried krill turkey and pellets...he doesnt seem to be growing at all...what can i do to make him a beast..or atleast look like hes gaining some pounds..thanks