my system is 27 gal total volume. I have kicked up my feeding habits from every other day to everyday for almost a week now (mixture of mysis, reef roids and crushed flake food broadcast fed). still no measurable nitrates in the system. I have lots of macro and it grows really well. Ive got a mangrove, I run cheato and dragons breath with the mangrove in my fuge, as well as a large plant in the DT itself. I'm pretty confident that between that, purigen and my corals, I will be able to export the NO3.
Not to mention I have High Alk because I was dosing purple tech to raise calcium, my sps is paling and I believe its due to no NO3 in the system. so if I get some NO3 I have a feeling everything will skyrocket in terms of growth