I want less than 0.03, but have to get a larger container for my GFO. The 6x27" reactor just doesn't hold enough GFO to get my levels less than 0.1 these days.
Coral Growth and unnecessary algae Growth tells me that PO4 need to reduce. I use Rowaphos 15 grams in my canister filter to keep Po4 at 0 level.
I just received my new stuff from AquaMarine Singapore for Po4 Reducer, is called SORB 4. still I didn't use this produce, any suggestion about SORB 4.
Nice Day