That's what I thought about bacto balance?! But it was suggested that I should stop dosing it?That’s strange, NP bacto balance contains phosphorus and nitrogen to avoid nutrients going to zero, how it works is replacing inorganic nutrient by organic nutrients that are preferred by coral and other organisms, if your phosphates are bottoming out you may have another source of N-Doc in your tank unless if you are aggressively removing phosphates wile using NP bacto balance normally the bacteria that the product encourages to grow is enough to keep phosphates at a desired level and I’m most cases phosphates absorbing media are not required.
That was my first thought because hen a test wouldn't show them up. I do have a lot if corals which all seem to be doing well so growth is going to equal consumption of lots of things.Maybe the cyano is consuming the nutrients?
I guess the best way to tell is to watch how the corals react. If they all look happy and healthy I guess I need not worry and just concentrate on the cyano/Dino removal instead of worrying about low nutrients