Re: [APD] powerhead recommendation for co2 reactor

["Candy M." <cry_little_sister at hotmail_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.

Yes this pic is very similar to the others I have found forcing the water 
from the powerhead or pump into the top of the python with the co2 line 
towards the bottom. I saw this type on George Booth's site amongst others.

> 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.

That is the reason I ask about the pump size I did not want to have too much 
flow and force the bubbles out of the tube before they could dissolve.

> 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.

Glitch here is the hob filters I have are overflow return types, so there is 
no return tube to t off of and it would be hard as far as I can tell to rig 
up a co2 containment bottle in the output of the filters. These are whisper 
hob filters that I purchased when I thought aquariums were for fish... 
before the planted tank addiction kicked in :)

I followed the link in the email to the external reactor, I had found this 
referenced before in the ADP archives but since I don't have a canister 
filter or a return tube to tap I did not see any way to do it as an external 
reactor.

Would I be better off to buy a small canister filter just for this purpose? 
I am trying to keep the cost as low as possible and work with what I have 
for the most part. (Hence some of my hairbrain ideas.)  In the remote future 
I would like to set up a sump system, then I could just feed the co2 into 
the sump from what I have read. I don't see it happening anytime soon due to 
income.

Thank you,
Candy

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