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I'm not sure where you get your cost info. The Rapids catalog, www.4rapid1.com, has the Norgren regulator (my personal favorite) with two gauges (and a Carbon Dioxide Cylinder Connector) for $65.95. The various fittings from Home Depot should only be a couple of $$.
The fitting you use between the regulator and the needle valve is called a nipple. You will need to remove the 3/8-inch valve/barb from the regulator first of course.
I agree that the ARO valves, which I use BTW, are not very good for our application but the Nupro valves are way overkill. Also the F01 is not a needle valve so that could be part of your problem. The correct model is N01. If you can find the Clippards for $25 or so you should be able to build a respectable system for less than a hundred bucks.
I've been doing my research on adding compressed CO2 to my planted tank.
I am currently using sugar-yeast on my 25g, but i'm not always around to
change the solution out and since i'm moving to a 75g, I figured it
was time to move up to compressed CO2. I'm trying to decide between 2
Less Expensive System:
53.95 KegWorks Beer Regulator
14.91 ARO FO1 Needle Valve
More Expensive System
47.60 B-SS4 Swagelok Nupro S Needle Valve
.50 B-405-3 Brass Insert for Tubing, 1/4"OD - 3/16" ID
40.65 R83-200-RNEA Norgren Regulator
6.00 18-008-002 Carbon Dioxide Cylinder Connector
18.35 18-013-244 2000psig Gauge
9.15 18-013-083 60psig gauge
7.45 16-009-001 1/4" PTF male to 1/4" tube
Will the less expensive setup work? Or should i spring for the Nupro S
needle valve and Norgren regulator? Any other suggestions?
Thanks for everybody's help on this.
PS: I haven't quite figured out what fitting I need between the
regulator and needle valve in either setup.