How to manage CO2 overnight
Hey guys, so I recently got a second tank and suddenly dosing thrive is no longer economically sound. I just got a DIY CO2 reactor, and am currently running it in my 10 gallon but plant on splitting it between my 10 and 15 gallon aquariums.
This sounds dumb, but I am confused as to how you can balance the CO2 when your lights go out at night and the CO2 is no longer used. If I turn the CO2 off at night, then the CO2 will drop rather quickly back to nearly 0 by morning. I know this because my well water has about 30 ppm CO2 and within a night after a water change, my pH is high again. In the morning, I would then have to turn the CO2 up high in order to make the buildup back to 30 ppm, then lower it in order to maintain.
I'm now considering running an aerator on a timer to control it. Could I run that all night, and then at some point before the lights come on, have it turn off in order to buildup the CO2 again? Is that the best method for balancing? That or basically the same thing, but with a solenoid instead.