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Re: [APD] Using powerheads for a CO2 diffuser
These are often used to maintain the siphon on, for
example, CPR Aquatic type overflows -- the low velocity
type that tend to collect air bubbles and lose their
siphon. They are also used on venturi protein skimmers.
TAAM, Inc (Manufacturer of Rio pumps) also sells a
conversion kit for the 600-800 and the 1700 models, called
the RVT Venturi Kit and sometimes called the Rejuvenation
Venturi, such as shown here:
These feed the gas (air or whatever you've got) line
directly into the pump volute.
Aquarium System Maxijet used to make a similar conversion
device that had a better rep for a while, called the
Maxijet Turbo Venturi Kit. I think those are harder to find
but this place still sells them:
With a little thought, you can figure several DIY ways to
accomplish the same thing with any powerhead that has an
intake screen -- which, come to think of it, might be why
it's so hard to find a store that carries this stuff.
Taam's concentration on new pump products has been on
higher pressure rather than highe velocity pumps, so I
wouldn't bet on them coming out with improvements on the
Have bubbles, have fun,
--- Thomas Barr <tcbiii at yahoo_com> wrote:
> I have been using a powerhead for a diffuser in one of
> my tanks. The CO2 is fed into the intake. The venturi is
> still there also making a loop, but the Rio 600-800
> series pumps have a special impeller, instead of 4 flat
> blades, these have 6 flexible blades that are optimized
> for fine bubble production.
> Note these are not the same regular Rio 600/800 pumps.
> No modification is needed, simply attach the CO2 line
> to the inlet and connect the other inlet to the the
> These are superior to common powerheads for this
> application and production of mist.The key is the
> impeller, these are quite good, but ideally one of those
> needle wheel skimmer impellers would be best.Maybe they
> will sell those later.
> If you direct the powerhead down into the plant beds
> from near the top of the tank , this will give you the
> best efficiecy.
> No reactor cup needed(plant leaves act as a baffle),
> simply plug the powerhaed into the light timer. CO
> 2comes on when you need it, off when you don't.
> Cost 15-20$, ease of use: very easy for both gas tanks
> or DIY CO2 sources.
> I would also suggest these for driving reactors if they
> are in the gph flow range you need.
> Tom Barr
> Yahoo! Personals
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