I’ve seen several comments that using too much GFO is bad. How do you know when you’ve used too much?
I just installed a reactor and am using a mix of Rox Carbon and Granular GFO (not high capacity) from BRS. The amount of GFO for my 80 gallon tank according the the instructions resulted in 1.25 cups (1 TBSP/4 gallons). This seemed like a lot so I put 3/4 cup in the reactor mixed with 3/4 cups of carbon. My phosphates were high ~0.2 ppm, but came down pretty quickly over a week to 0.04 ppm, which I’m happy about. I believe that the phosphate was(is?) leaching from my rock. When do I start worrying about too much GFO?
I just installed a reactor and am using a mix of Rox Carbon and Granular GFO (not high capacity) from BRS. The amount of GFO for my 80 gallon tank according the the instructions resulted in 1.25 cups (1 TBSP/4 gallons). This seemed like a lot so I put 3/4 cup in the reactor mixed with 3/4 cups of carbon. My phosphates were high ~0.2 ppm, but came down pretty quickly over a week to 0.04 ppm, which I’m happy about. I believe that the phosphate was(is?) leaching from my rock. When do I start worrying about too much GFO?