I'm leaving my tank fishless for 73 days to kill the icy in my DT and to treat them in a HT for ich. is there anything i can give my corals to keep them happy while the fish aren't providing their nutrients? not far my phosphates and nitrates are zero. they were always low even with fish in the tank. so far I've been feeding them every other day with a rotation of with red seas reef energy A & B , phytoplankton/zooplankton and once a month i grind up raw oysters and target feed them. I also dose acro power daily. Anything I'm missing?