My nano system is only few months old, I usually feed my fish includes a clown twice daily but try in controlled amounts, but also have filter feeders as scallop and duster, so more feeding at times going on. New system watch things and do water changes as needed. I turn pump off at least 10 minutes or more during the feed.
Food used a jellyfish fatty plankton, frozen brine, garlic flakes, last every other day lobster pellets for Emerald Crabs, use a long plant mover device as Crabs stay on the rocks, just making sure they eat.
I'm new to these modern procedures, learning daily. Have fun!