I use target feed my rics a while ago, and is definatelly beneficial but I really dont have the patience now, a high nutrient system is beneficial for mushroom such as rics and zoanthids / but is a 2 way street and is not so beneficial for sps's so I try to feed not much lately , and skimm more they do fine too. (IMHO)
Robz you have done a wonderful job creating such a natural environment for all the beautiful and gorgeous corals you keep!
Difinitely I'm trying to achieve some day to get my tank to look like yours!