I feed a 1/4 cube of frozen brine shrimp every 2 weeks or so. This is mainly to feed my shrimp and Scooter Blennie. My Pygmy Angel eats algae and my 6-line Wrasse eats pods. 3 fish under 2" each in a 30gal full of LR & LS seems to make a perfect ecosystem. The way I look at it, if you have to feed them frequently, you are not supplying them with a natural environment. My fish are all trim and healthy, not skinny and sunken in or round and fat. Just my opinion.