I just got my ATS online 5 days ago. I have been running a Coil Denitrator for about 2 years now. It has done an excellent job at keeping N at (or near) zero. The reason for the ATS is P removal. I don't have a test kit, but I'm pretty sure it's very high, as I have significant nuisance algae growth on my rocks.
So my question is, should I go ahead and remove the Coil Denitrator? Does the ATS need N to function properly, or will screen grow fine with high P levels alone?
Thoughts?