| | Length Of In-Tank CO2 Reactor Tube
I'm building a CO2 reactor that's made of a gravel vac tube attached to a powerhead. The CO2 bubbles into the vac tube, the powerhead swirls the gas around some bio-balls (held in place by a foam plug), and CO2-rich water escapes out the bottom. Evidently this is a very popular design for us non-cannister filter folks...
Every reactor of this type I've seen on the net uses a 10" or so gravel tube. I'm considering using a longer one because I don't think I'll like the look of the tube extending halfway down in a back corner of my 55g. Does anyone foresee any problems if the tube extends an inch or two above the substrate? Or for that matter, what if I stuff the foam up the tube 3 or 4 inches from the substrate, have the bottom of the tube extend INTO the substrate, and drill some holes in the tube below the foam plug but above the substrate to allow the CO2-rich water to flow into the tank?
The powerhead should be strong enough to accomodate the extra length, I think -- Maxi-Jet Powerhead/Pump Model 600 (160 gph).