Hi, I'm new here but I've always read about low stable NO3 making red plants red and high PO4 keeping spot algae from growing on the glass. Has anyone maintained a NO3 value of <5mg/l and a PO4 value of 1.5-2.0 mg/l? This is way out of the 10:1 ratio which I've read about though. I want to make my red plants redder and at the same time try to remove the spot algae from my anubias and from the glass. Thanks in advance for any advice 