If you have it hooked to a controller it makes it even easier (a ca reactor) to dial in. I just set it so that if ph in the reactor is greater than 6.8, then turn co2 on, and if it's less then 6.7 turn it off. Then I really don't care as to what the bubble count of my CO2 is at. Hope this helps. I found it easiest also to T off my return pump a 1/4" flexible hose to feed the reactor. I used to gravity feed but I found that after a few months it would get clogged. Hope this helps.
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