Datapoint. I was curing ~100lbs of concrete in my tank (before life).
The starting pH was 11
I turned on my very large skimmer
pH dropped to 9 very quickly and then stabilized to 8 within a few hours.
This was in ~500gal of tap water.
I kept this up for a couple of weeks - pH never went above 8.3. I would occasionally turn the skimmer off to test the "curing"
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 - the state it is in CO2, carbonate or bicarbonate doesn't matter.
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Failure isn't an option It's a requirement. 660g 380inwall+280smp/surge S/L/Soft/Maxima/RBTA/Clown/Chromis/Anthias/Tang/Mandarin/Jawfish/Goby/Wrasse/D'back. DIY 12' Skimmer ActuatedSurge ConcreteScape
Last edited by karimwassef; 01/15/2017 at 05:45 PM.
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