Yes you can feed more than once a day like above, however the food can rot if not digested and kill the animal. Also it would depend on what you are feeding, and how much? I feed my tank daily, lite in the morning and heavier at night. The rhizo's will spit the food out if it is not digested, or too much food has been eaten later on in the night, but the Dendros and sun corals will not IME. I hope this helped.