Good to know, I will be watchn your progress. I started to does Sodium Phosphate yesterday. I was also in the same boat, 0.00 'phosphates and relatively low nitrates, this is after I did a major sump cleaning as well as using nopox...Today I tested the Phosphates (Hanna Checker/API) and they were at .033 ppm per Hanna and API .25ppm. I will continue to monitor mine and see if it continues to increase.
What’s the dilution on that, or how do mix that into solution and dose?