Duo-Reactor question?

[jrizo1]

I have a quick question about Duo-Reactor
I am installing a duo reactor in line with one pump, one with carbon and one with GFO. The question is witch one goes first?
Thanks in advance

 

[ClownMan727]

I would run the gfo first. You can control the tumble better.

 

[koddyVT]

I agree. GFO typically requires a higher flow rate than carbon.