Can you use needle wheel pump as a CO2 injection instead of Mazzei. As Tom mentioned, if you "T" it off your return line, it would add addiontion pressure to the line and increase the out flow rate. Tom mentioned in his needle wheel thread that the needle wheel maybe even better at breaking down CO2 than Mazzei. I'm considering one or the other for my tank, the only downside to needle wheel is that it's another electric consumption device that I can get rid of if I use Mazzei.