Well i ended up putting the reactor in-line just to try it. The reactor is actually one of those large whole house filters that I modified. With just bio balls in it for diffusion, it has drastically cut down on the amount of bubbles that I see in the tank. I will try pot scrubbers next and see if that helps. Overall though, I have been able to turn down the CO2 output and still maintain the levels in the tank that I need. best of both worlds? the NW really breaks up the CO2 and the agitation in the reactor churns it up until most of it is gone.