I just hooked up this system to my 90 gal tank, and it's working beautifully. I had a bit of a probelm finding a way to connect a Paintball cylinder to the regulator, as most paintball tanks now do not have a on/off valve, but a needle valve at the top. The regulator I purchased says"Standard CO2 Cylinders", so maybe I gotthe wrong one. In any case, I got it working using a small ball bearing in the nozzle to dpress the needle valve, and I'm good to go. It comes with plenty of tubing, and the directions are simple to follow. A great deal for the $.