Thanks for the input. I forgot to mention I have a low bioload in the way of fish, do not feed heavily, hence the need to add phosphates and nitrates to keep a readable amount so my corals have good color. I feed pods and rotifers every day as I grow them myself. 2 different types of pods. I have hundreds of strombus snails, many trocus, a tuxedo urchin and a couple turbo snails. My tank is a 75 gallon reefer. I also run a reverse daylight ATS mainly to keep the O2 levels up during the night.