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Re: [APD] CO2 rates, CF & pH swings
Tom Wood wrote:
> Since you already have the equipment, that sounds like a good plan. The
> other way to do it is to create enough circulation in the water so that the
> tank is blowing off CO2 at a constant rate, night or day. Provide enough
> CO2 that the fish don't stress, especially at night. Then, the fish are
> safe and the plants dip into the reserve during the day. It won't be
> absolutely optimal for the plants, but works at a simple foolproof
> mechanical level for the fish.
Being the pessimist that I am, I like to set things up in a fail-safe
manner if at all possible. Counting on circulation or aeration to
maintain safe CO2 levels seems dangerous to me. Sure, it's rare that a
pump fails, but you just know it will happen when you're on a ten-day
vacation and no one is there to see the fish gasping for air. In the
OP's situation, it seems to me like a normally closed solenoid on the
light timer is the way to go. That way, a failure only means that the
plants have no CO2. It won't kill them and the fish are spared.
--
Jerry Baker
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