Most effective method(s) for injecting CO2
I've been out of the game for a number of years, and recently have jumped back in. With regards to CO2, what is considered the best ways to get it dissolved into the tank?
Before i went on hiatus (~5 yrs ago), I was injecting CO2 directly into the needle wheel impeller of my sump's pump return. The return flow went through a PVC reactor to catch some of the bubbles before it hit my tank. It seemed to work pretty good, but I went through my CO2 pretty quickly to keep my levels up (partly due to the sump system I know).
I'm running that same system right now, with the seltzer water effect. But now exploring some different ideas, to see whats the latest and greatest