The Planted Tank Forum - View Single Post - Co2 saturation before lights on.
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post #3 of (permalink) Old 10-21-2019, 06:08 PM
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Agreed. I inject around 8bps in a 21 long tank, which results in a 1.2 pH drop. Even with that injection rate, it takes over an hour to hit 1.0 pH drop and I start injection 2 hours beforehand. This graph is from my tank (about 6 weeks ago), taken using a pH probe and reef-pi. If you don't start beforehand, you're giving plants light and nutrients, without the corresponding CO2 for a significant amount of the photoperiod.

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