For my tank, 150 gal DT & 30 gal sump, my chaeto can keep my nutrients level but not lower it much. To lower phosphate from 0.4 to 0.2ppm, I carbon-dose using vodka. My nitrate is also being lowered.
Here's link about vodka carbon-dosing that I'm following: http://reefkeeping.com/issues/2008-08/nftt/
Here's link about vodka carbon-dosing that I'm following: http://reefkeeping.com/issues/2008-08/nftt/