I dont know Randy! I have had to dose Phosphates for 6 months now and when I stopped for few days it went from 70PPB to 5PPB. I am pretty convinced in my tank Vodka is doing a number on my Phosphates... which is why I am dosing Phosphates continuously still!Ok, let us know. Algae and the ats are good ways to reduce phosphate, organic carbon dosing, not so much.