3 reactors setup Question

[LVCaniac]

I currently run Carbon and GFO in an dual BRS Reactor.

 

I'd like to add a single reactors with biopellets.

 

My plan is to add it before the carbon, but i didnt know if i should have GFO first or if it even matters. My gut says no.

 

[Nanofreak79]

You don't need gfo when using pellets. I only used it until the pellets kicked in.