I can tell you that I have a lot of life on mine and I have never actually fed it... If anything I clean it off a lot with a turkey baster to get the detritus build up off.. It gets what the tank gets when I feed the fish and corals... This feeds the entire tank.. however, I never make it a point to feed the
LR...The feather dusters you have are not real demanding and will live through anything....Matter of fact, in a while, you may be having to kill them off a bit because they reproduce quickly...