The Planted Tank Forum - View Single Post - CO2 - Reuse 2 liter bottles?
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Old 02-17-2013, 01:31 AM   #5
Hoppy
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An easier way to refill the bottles is to always do it at night, after the tank lights are off. The plants don't need CO2 at night, so your new bottle has at least 12 hours to come up to producing good CO2 before it is needed.
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