Stumped setting up Dupla Reactor 400

[BlueHeeler]

Just trying to set up my newly purchased Co2 kit. Bit stumped about the actual way to go about setting up the Reactor 400. How do I plumb that in with the return line from the Eheim 2217? I have read and reread the instructions and I don't understand how to do it. Does anyone here use a Reactor 400? Can you tell me how you plumbed yours in?

Thanks

[ILLUSN]

G'day mate, cut youe 12/16mm output hose at about the right sopt for your reactor, next got get yourself reducing piece from 12/16-9/12 (Eheim part number EH4003622) you'll need 2 one for the top one for the bottom of the reactor. get a bit of 9mm hose (20cm shoould be plenty) and hook the output of your filter to the top of the reactor (you'll need the reducing pice to go from 12/16 to 9/12 then put the 9/12 hose on the reactor) and then connect the output of your reactor (bottom) to the hose leading to your spray bar.