Got a PhosBan reactor! What can I expect?

[Seriak]

You can run both, but put the carbon on top separated by a sponge and leave enough room between the gfo and carbon for the gfo to tumble a bit.

[Bblinks]

I have ran both in the same reactor without any issues. Two main reasons most of us use different reactor is so that first, we can set different flow rate since carbon should be set at a lower flowrate and GFO should have enough flow to so it tumbles. Secondly the exhaust rate on them are both different, some say GFO can last up to 3 month and carbon should be replaced monthly. I change out monthly for both so its always consistent.