i agree with Dave in that the frequency depends on the species.
i have very few fish even once my tanks are established and they usually can find most of what they need in the tank.
i presently only have a single Clarki, a clown goby, and a yellow tang in my 90g. they went without feedings for weeks at a time. i do add a little protein (blender mush) from time to time for the benefit of my LPS and the Clarki but i really don't know that it is a requirement.
there is plenty of pods to prey upon when the Clarki has the entire population to split between itself and a tiny goby that often ends up in the sump for weeks at a time.
the tang is a temporary new hire but he can't keep up with the algae load as it is. if he were to eradicate it i would feed daily nori.
i do feed regularly now but only because i am housing a RBTA. and i feed it a couple times a week and the food has spirulina and various rarities that the fish will appreciate.
my last tank i fed daily with mush because it became densely populated with little water volume. it seemed necessary as food would be rabidly devoured when added.
just to be more lenghty :wink:
i think many species of anthias could go without frequent feedings in my tank if i were to only keep one or two if i were to remove the current inhabitants. the pod level is quite high when the pred
ators are kept at a minimum.