DIY CO2 bubbles per minute
First question, when figuring bubbles per minute in a DIY CO2 system, do you count from the bubble counter (a 20 oz bottle to collect the gas) or from the end of the diffuser?
Second question, in a 29 gallon (if that's a factor), what sort of BPM do you want to shoot for?
I'm currently seeing about 90 per minute (1.5 per second). I'm not sure if this is high/low/just right. I'm trying to regulate my CO2. I test up to 27 ppm and I'd like to lower it a bit, but I'm not sure how much to turn it down (I use a series of valves/splitters).