Re: [APD] powerhead recommendation for co2 reactor

["S. Hieber" <shieber at yahoo_com>]

If you're going to use a Python gravel vac tube as the
reactor chamber, open at the bottom, the easiest thing is
to connect a water output to the top. You can insert the
CO2 by having the CO2 line enter the Python at the bottom.
YOu can strap the CO2 line to the Python with some plactic
ties used for bundling wire. Or you can use some rigid
airline tubing bent into a J shape (warm briefly over a
small flame, bend and hold in position until it cools.

I'll send you a pic.

With the water going in at the top, the CO2 cannot escape
except to be absrobed into the water or, less desirable,
forced out by too strong a water flow.

You coul dTee off the HOB filter output if the output is
via a tube and adjust the water flow with a ball valve so
that it's just enough to not let the CO2 collect more and
more in the Python. Using a tee will probably give you an
okay water flow without the valve.

The bottle top set up would work better on an output for
the smae reason that the Python works better that way --
the CO2 cannot escape unless it's absrobed.

Scott H.
--- "Candy M." <cry_little_sister at hotmail_com> wrote:
> Since I am using a hob powerfilter and do not have a
> canister or sump, I am 
> planning to make a co2 reactor out of a python tube. Is
> this the best way to 
> go?
> Could someone recommend a powerhead for it? The tank it
> will go in is a 55 
> gallon.
> I have read online that you can use a rio 600 or a hagen
> 201 are either 
> better? I will also be making one for a 29 gallon would
> the same pump work 
> on it as far as flow rate?
> I want to have enough flow to dissolve the co2 but don't
> want too much 
> turbulence. I had tried a powerhead in a neon tank before
> and they couldn't 
> seem to deal with the excess  water movement. I currently
> use diy yeast c02 
> on both tanks, one on the 29 and 2 bottles on the 55. At
> the moment I am 
> using the top section of a 1 liter bottle cut to fit
> around the intake tube 
> and placed just above the water inlet screen. It creates
> a co2 bubble about 
> 2 inches deep above the "flow" area and any excess is
> sucked into the inlet. 
> My theory was that any co2 in the bubble area is affected
> by the water flow 
> being pulled into the inlet tube and the flow would help
> to dissolve the 
> co2. This seems to work ok but I suspect it is not
> dissolving enough co2 
> into the 55 gallon tank.
> 
> Thanks
> Candy
> 
>
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=====
S. Hieber

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