You dont need any supplements esp. to start off with. I have corals in my tank that are over 13 yrs old and have never been target fed. They get all they need from the lighting and water column. Saying that there are some low light corals and some high light corals that might need some target feeding but only with some light feeding. No supplements needed as PWC
`s will take care of depleted trace elements. But as far as a moderate light reef I dont see where feedings are necessary.