gfo still good?


NYRC member
i have some gfo in a reactor with tank water thats been sitting there for months, i had it running only for a few days before taking it offline. Is it still good?


New member
It probably can still remove phosphate but i would rinse it wellll before using it since I bet it smells really bad


Premium Member
If the smell is okay, it's likely safeto use, although it might be coated with enough bacteria to make it ineffective at removing phosphate.