I do have a drop checker, and use it as a visual indicator to keep my CO2 in check as well as a reference point with which to dial in my CO2 levels when initially setting up the controller...
I agree that a drop checker is vital, as even the best pH probe will begin to give inaccurate readings after a while; plus it makes it super simple to fine-tune CO2 levels with little guesswork...
For me, the greatest thing about the AC Jr. is the multi-faceted timer controls, which I find extremely useful. Plus I think that, long term, it will help me keep my hands out of the tank!!
Thanks you both for your insight! Always appreciated...
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