You use a syringe... inject food to the polyps (opened). You can use Cyclopeeze, Reefroid, Mysis, Brine Shrimp... even pellets!!! They eat anything... just need to target to help them eat... some reefers flood the tank with food (floating to let them catch their own food) but this can be quite messy. You can off the protein skimmer/filter a while to allow the extra food to circulate in the tank a little longer (for other corals/fishes). Don't forget to on back your skiimer/filter after feeding.