For what it's worth. I dosed: 5ppm NO3 using KNO3, 1.0ppm PO4 using fleet enema, 30mls BigAlsMicro's = ~.25ppm chelated iron, 11ppm K (6from KNO3, 5 from KCL), 1 tsp Mg (Epsom salts). Why I dosed to .25 iron (b/c the instructions said .25-.5ppm) instead of only .1 is beyond me!
The next day the tank was getting cloudy/green. I waited one more day, it looked a little worse. Did a 50% water change and re-dosed at a lighter dosage.
Dosed to 3ppm NO3 using KNO3, no KCL, 1 tsp Mg (using Epsom salt), .1 iron using Plantex CSM+B, 0.5ppm PO4 (fleet enema). I also added 6 Amano shrimp, not many in a 90gal tank! Like freaking magic *poof!* tank cleared up like crystal!