[APD] The most simple C02 reactor yet!

[Chris Hotte <ecwh at cogeco_ca>]

Simplest reactor yet.

I was using a powerhead, as you might have seen me post earlier this 
week. I was using around around a bubble every 3 seconds or so. I was 
reading online about diffusors and reactors and came across one post on 
the Krib. See:

http://www.thekrib.com/Plants/CO2/diffuser.html
Power CO2 reactor (DIY)
by "G. G. Rajendra Kumar" <ggrk/blr.vsnl.net.in>
Date: Mon, 23 Mar 1998

I thought, why use a powerhead at all? I already have a spraybar coming 
off the Eheim, so why not just cap the end and tap into it. So I did 
just that. I found a 5ml test tube cap and it fits perfectly on the end 
of the spraybar. The Eheim originally came with one, but I or my cat 
misplaced it long ago. Opposite to the holes running along the bar 
(bottom) I drilled a hole (top) and pushed in the C02 airline directly. 
It took took maybe 10 minutes to complete and that included locating a 
suitable spraybar end cap and a drill bit.

It's extremely efficent and I'm going to have to build a bubble counter. 
The C02 stretches along the top of the bar and burps every now and again 
but I'm trying cut it back. Again, I need a better needle valve for 
control. In the 20 minutes I was playing with adjustment, pH dropped  
0.1.  If I'm not mistaken, that's a fairly high infusion rate for a 
65Gal tank.

I need to build an inline counter pronto. I've seen online directions 
before, but misplaced them.  Links anyone?

- Chris.
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