Sounds like a good setup. It would probably work fine just as you described, but I'd still put the co2 beneath the powerhead and let the impeller crush the bubbles before sending them to the diffusion chamber. Two benefits from doing this: 1) More surface area for absorption into the water column. and 2) You can count the bubbles as they exit the tube in the aquarium and enter the powerhead. - free bubble counter.
I'm actually thinking of taking my external reacor out of line with my Fluval canister and putting it on its own powerhead and doing just that.
- Sam P -
plantedtanker in limbo - all tanks currently in storage