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Shutting Off CO2 At Night On A Large Tank
I am waiting for my needle wheel pump to get here next week and then will crank up the CO2 on my 150. I know a lot of people shut down their CO2 at night and start up an hour or two before lights on. Is it harder to do this with a larger tank that needs more total CO2 to stay in tune?
Planted Tank Guru
It takes about an hour for the CO2 to get up to speed, keep reading that it takes about the same in smaller tanks too. I just test the water at lights out and want the tank water pH to be about that when the lights turn on and completely ignore slowpoke drop checkers.
Planted Tank Enthusiast
Yea there's a number of people here that leave it on 24/7. I don't see it being too difficult to turn it off and the fish get used to the fluctuating changes. I turn mine on 30 minutes before hand but only have a 25 gallon tank so turning it on an hour before hand (and also could turn it off 30-60 minutes before the lights turn off) shouldn't be a problem. It's not like the plants need absolutely perfect parameters as soon as the lights turn on so even if the co2 is a bit lower, it'll get to the correct point soon enough.