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Re: [APD] Using powerheads for a CO2 diffuser (Thomas Barr)
Which pump? Few powerheads have the ability to develop
much presssure or draw much vacuum. They accomodate
resistance to water flow by moving less water and wasting
more energy spinning the impeller blades in more of the
same water in the volute. In the extreme case, if you
completely block water flow, the impeller spins happily and
the water in the volute doesn't change at all.
They can produce a few psi, so blocking the intake side is
more likely to result in bubbles forming in the volute
--- beaker <pweifan at yahoo_com> wrote:
> My only concern with using this pump is that I'm using
> DIY CO2. Is the
> suction so great that it will start to suck the
> containers in on
> themselves, crushing them and pulling the contents into
> the fish tank?
> Is this a real concern or am I being paranoid?
> Scott aka beaker
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