Cindy, I've used a scuba tank for air brushing for about ten years now and have been really happy with it. It was a cheap alternative for me at the time since I already owned the scuba tank. The regulator to regulate the air pressure down to what the brush can handle cost less than $40 at the time. I'll check at home this weedend for specifics on the regulator. I think I got it at a mining shop. Or was it welding? I'll check on it. If you don't get alot of answers on this, I'll let you know what I found on Monday. I think this is a great source of air. It's really quiet. Only drawback is that you have to keep refilling the tank, but for the amount I do I can go eight months to a year between fills. Hey, PS. If anyone gets this would you let me know? I seem to be email impaired. Linda Heath Clark Environmental Research Scientist/Biological Scientific Illustrator California Dept. of Pesticide Regulation Sacramento, CA [log in to unmask]