How Much GFO for a 75 Gallon?

[footballcs12]

I just ordered a GFO reactor and pump from BRS along with some GFO, but Ive never used any of this stuff before. How much GFO should I use for a 75 gallon mixed reef with a 30 gallon sump?

[reefgeezer]

I use about 1/3 of a cup. I'd start with about 1/4 cup and see how that works. It's easy to use too much and strip too much too fast.

[rogersb]

I use about 1/3 of a cup. I'd start with about 1/4 cup and see how that works. It's easy to use too much and strip too much too fast.

That seems low. I would've said 1 cup but work up from 1/2 cup.

[D-Nak]

Use the GFO calculator on the BRS site. The amount varies by type of GFO. I started with half the recommended amount, then slowly worked up to the recommeded amount.

[LinkinReef]

Same here using the brs calculator and cutting in half to start and raise it little by little.

[kingb4c0]

I would start with 1/2 of what BRS recommend, test your effluent weekly to make sure is not exhausted and start leaching phosphate back into your system.