The Planted Tank Forum - View Single Post - Why do we start co2 an hour before light ?
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Old 01-07-2013, 02:27 AM   #11
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The pH of my tank at lights on without CO2 added is 7.6 and my target pH is about 6.4-6.6. I turn on the CO2 half an hour before lights go on and turn it off 40 minutes before lights go out and probably could turn it off earlier.
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