ditto.....DCDo you have a PH controller if so then you don't need one because the controller will turn of the CO2
you can set a needle valve low and count the bubbles in the out put device
reactor/ladder but if you have a difusser it might get harder to adjust.
I would say I don't think you need one
I will listen for more input here first.
Robert
That is what I do, eyeball the bubble coming out of the diffusor. I bump up the co2 just a little bit at a time until I'm at a good level.you can set a needle valve low and count the bubbles in the out put device
reactor/ladder but if you have a difusser it might get harder to adjust.