DSC, I think maybe you are misinterpreting what I'm going for. I am not fresking out about nitrates and phosphates. I had them under control and exactly where I wanted them, but I don't like NOPOX because I think it causes adverse affects or at the very least requires that you feed every day. I want to get away from that system because it takes too much effort. So I'm looking for a different system. The only thing I've changed is to add a GFO reactor. Nothing else has changed. I'm not worried about nitrate and phosphate, per se. I know they used to be very high in my tank and well above levels where acros thrive. I started the NOPOx program and all that it entails. Nitrates and phosphates came down to where I wanted them but, as I described, I don't like the program with all its additives. So I am making changes slowly to get off this program. The only change made this far is to add a GFO. And even then I'm only using half a dose. I'll watch pH to make sure it doesn't change, but admittedly there are downsides to almost any program I've heard of.