I have to on my tank 1 per external reactor but only as the came with other bits i bought only really use it for reference once i've changed bottle but just tried to count it and i would say 4-6bps i just rely on fish behaviour and dc.
|Bubble counter fluid||Carbon Dioxide (CO2)||6|
|Regulator not holding to consistent bubble count||Carbon Dioxide (CO2)||8|
|J||Loss of bubble control||Carbon Dioxide (CO2)||2|
|Water coming out of bubble counter||Carbon Dioxide (CO2)||2|
|T||check valve built into bubble counter question||Carbon Dioxide (CO2)||1|
|T||Loss of water in bubble counter||Carbon Dioxide (CO2)||10|