Absolutely, i know one of the red sea's marine biologists and he told me that on the phone. he said " your corals will starve without ANY nitrate and phosphates" unless your running a zeovit system. but in my opinion zeovit tanks look great but the corals are starving. its kind of cruel in my eyes. if everyone thought starving dogs looked great would you bearly feed your dog and when u did it was some chemical to make it shine? i sure hope not. i love and respect ALL living things so if I have the honor to get to have life in captivity i want whatever it is to be well fed and happy, not starved just to look good. sorry about the rant lolWow, just so I'm clear, a trace amount of phosphate and nitrate is good, even for sps?