No need to feed especially with the hqi light! But will not hurt them to feed as much as you desired the will just multiply faster.Beware of putting to much food into the water column tho..open invite to unwanted growths,spot feed only with flow reduced or better yet off.
what should i feed? i'd like them to grow and multiply
stay away from krill since i heard they're high in phosphates
Depends on the size of the Zoa's if you were planning on feeding them. If they're small then you may want to try Ova from Nutramar. Good stuff. For the hammer, you could always just feed brine or mysis. I would stay away from krill since i heard they're high in phosphates
Whether it's krill, mysis, or any other organic food, they are all going to be high in phosphates. Krill is supposed to be super high in omega 3s, which is a good thing for us and our finned/polyped friends.