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[APD] Re: CO2 off at night

> But then, imo, you pretty much forsake the only significant
> advantage of nights-off.
> Scott H.

Significant? :-)
Well with a number of tanks perhaps.
I think the main advantage is to jam a bunch of gas in there when you need
it, even if it's a bit higher than you normally want, then each night, it
can out gas. Folks often over do the CO2 or under do it.
This allows folks a bit more error on the higher end.
A powerhead will also mix the water more when you have the lights on and get
the nutrients and CO2 to the plants more effectively. Good mixing of the
water is key to CO2 in larger tanks.

Tom Barr

> --- Thomas Barr <tcbiii at earthlink_net> wrote:
>> . . . Folks don't have to use a solenoid to convert to
>> semiautomated CO2 control.
>> They can use a powerhead that pushed water through a CO2
>> reactor etc. When
>> the reactor stops flowing, the gas stops being dissolved.
>> The excess gas
>> burps out into the air above.

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