Have you thought about using a product like Foz down for phoshate control works awesome and predictable and you can dose it by mixing it in Ro water, after its all set up and running you can just adjust the dose and your P04 will follow . Its More predictable, easier and WAYYY cheaper then GFO, once you switch you never go back.
__________________
Current tank---125 gallon mixed reef 60 gallon sump, Reef octopus nw200 skimmer, Rapid LEDs, Maxspec gyre, Mp10s, Fuge, Biweekly 20% WC, QT everything
|