I had about 5 bps going through it, but the size of the bubble is about 1/2 the size of my old bubble counter, I know this cos of the position of the thumb wheel adjuster on the CO2 canister is 1/2 what it was with the other systems Ive tested. Ive turned it down to 3 BPS now, so Ill see what that produces.

So anyway, it looks like this is about 200% more efficient than that vario tower thing. Which Im very happy about. I wonder if this has to do with misting methods vs dissolving methods.

I have hard water, in a 37gallon tank.

I think BPS is a very inaccurate way of measuring input, as every bubble counter has a different sized exit appature, thus creating different sized bubbles. We almost need a proper flow meter on them to be able to compare.