I have read that you should feed anywhere from once every other day to couple of times a day. Which is best. I feed every 12 hrs and my fish are pigs when I walk up to the tank they greet me and beg for food, fun to watch but don't want to overfeed. My nitrates run in the 20's and the clean up crew seems to do a great job. Food that makes it to the bottom is gone and bottom clean in the am.