who/what to feed?

[BC Mosaic]

My 80g is rather new and thriving (50/50 cured and fresh LR). I have hitchhikers: a few Xenias, green star polyps, clove coral, zoos and 3 chromis (to speed up the cycling - Ha!! Ya right!).
When should I start feeding and whom and what kind of food?
BTW, I do feed my Chromis flake but just enough that there is no leftovers.
Thanks