A CO2 set up out of paintball equipment.
Ok i know everone says not to do it but I already have all the stuff from a bunch of my old gun setups. Ok I was thinking on using my old maxflo regulator (know for being the most accurate reg on the market) which I just tested and will easily hold its own in the 0-30 psi range. This would sit ontop of a 20oz co2 tank that I have lying around. I would output the reg to a needle valve and then to a diy bubble counter.
Now I would buy a real setup but am a poor college student and have all this stuff (minus the needle valve) already, and I love a good project.
As far as airline I would use the macro line that is already on the fittings till I get to the needle valve, then I would have to pick up some co2 line.
Not sure what I would use as a diffuser, this will probably be on my ten gallon, but if it works well enough I would throw it on my 65. Currently Im only running 1.8 wpg on the 65 I hope to jump it to 200 watts soon.
I think this will work, I know the 20 oz wouldnt last long, but I have a buddy who will fill it for free so I'm not to worried about that.