Jason,

I don't have a photo any longer, but there are 2 ways to use this reactor and you are describing both at once.

1) Inline with canister -- I'm not sure how this one is done.
2) Stand-alone (the way I did it) -- this is the only time you have the Rio pump involved, and the reactor is not connected to the canister filter at all. The Rio is in the tank. It's output is directed into the top of the reactor via tubing. You direct the output from the bottom of the reactor up and back into the tank.

I hope someone posts a picture of inline use. I would like to see that.