I feed once or twice a week. For fish I have a neon wrasse, a 6line wrasse, a pygmy angel, a yellow tail damsel, and may or may not have a little goby still in there. They all pick at the rocks all day long, and look fairly fat, so I don't really feed all that often. However, I have not ran my skimmer since xmas, and noticed a bright and rich color enhancement with several of my acros... its my monticaps, and my digi that look bad