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RE: [APD] Re: CO2 off at night

> CO2 do not displace O2, so dosing CO2 at nigth will not cause lack of O2..

I realize that. It's just that O2 is being used up at night by plants, fish,
and snails. In a closed system, I'm worried the O2 will run out before
morning when the plants can start supplying the tank with O2 again.

The only reason for running an aerator at night is to add O2 to the tank.
However, the aerator will also dissipate some CO2, but I don't really care
about that (or should I?). My apologies if my post caused any


Shireen Gonzaga
Baltimore, MD

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