I just set up a new tank. 65 gal. I'm diffusing my CO2 with the diffuser that shoots the bubbles from side to side as they rise through the rungs (don't know if this has a name). I put this below the vertical output bar of my canister filter so that the last bubbles get pushed down and jump around a moment or two. This is all done on one side of the tank, not the back. My bubble count is about one per second. Haven't checked ppm yet, but getting good pearling in the afternoon. Any suggestions? I'm obviously new at this.