SPotter, I am not exactly sure what my PO4 is. It always tests 0. I have some slime algae on my LR so I assume there is phospahate. I run GFO, skim wet, and I am adding a little vodka. Again, my acros are all looking very good. Good polyp extension and growth. Its just my monti's giving me a hard time.
I am really starting to think it is either light or infection. My water is noticably clearer and I assume I am getting better light penatration. I did change the type of lights I use from Radium to XM 15K's as well. I think it could be infection first because it happened all over the tank. It started with the Monti cap on the right, spread to a plating monti on the botom of the tank, then to my purple cap on the left side. I do have one piece of my purple monti in my frag tank, which is connected to the main system, that has been totally unaffected to this point.
Thank you for the questions, I really want to get to a cause.