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Old 01/15/2017, 05:42 PM   #15
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Originally Posted by karimwassef View Post
Datapoint. I was curing ~100lbs of concrete in my tank (before life).

math problem: how much CO2 does it take to do that and how is it that this abundance of CO2 is not available to algae?

My conclusion - as quickly as the algae (or in my case concrete) consumes CO2, it is replenished.
Quote - Freshwater aquarists caring for brightly-lit planted aquaria have long known the importance of CO2, and often add carbon dioxide directly to the aquarium water in one way or another to supply those tanks' substantial need for this material.

Randy Holmes Farley.

seems CO2 cannot defuse into freshwater fast enough for planted aquaria

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