The Planted Tank Forum - View Single Post - timer verses ph monitoring
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post #4 of (permalink) Old 11-14-2012, 02:52 PM
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Turning CO2 on 40 minutes before lights on = allows CO2 sat to build up so plants can take advantage of lighting/ferts/CO2.

Turning it off 40min before lights off = allows most of the CO2 to be used up before everything goes dark.

Times vary and so will your mileage. Just have to find the sweet spot.

Timers = a lot cheaper than a pH monitor.
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