Shutting Off CO2 At Night On A Large Tank
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Old 12-11-2012, 07:56 PM   #1
smiller
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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?
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Old 12-11-2012, 10:09 PM   #2
Kathyy
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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.
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Old 12-11-2012, 10:12 PM   #3
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Thanks very much. I use an AquaController so keeping tabs on the pH will be simple enough.
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Old 12-11-2012, 10:56 PM   #4
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I leave mine on 24 hours on my 125g. the tank is 14$ to refill every 18 months so its cheap and I don't have to worry about it.
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Old 12-11-2012, 11:13 PM   #5
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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.
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