downhillbiker
04/14/2008, 05:14 PM
I am thinking of using GFO in my canister filter to help remove phosphates, even though i am getting 0 readings.
My question is...How much do I need for a 75 gallon tank? And how long does it last? How often should I replace it?
My question is...How much do I need for a 75 gallon tank? And how long does it last? How often should I replace it?