Well, today I was looking for volume buy filling a 10 gallon tank. It seems im looking at 1 psi every 10 minutes, give or take. Keep in mind its only 1 hydrogen generator pulling 2 amps at 12 volts. Ive also mixed in a little bakingsoda to give a little extra electrolight to the distilled water. The volume output isnt as high as id like, my goal is 1 psi a minute on a max of 10 amps for a 10 gallon container. If I can get it even better thats great. Any ideas??? It seems that surface area of stainless is a key also. I tryed another test to see what effects the hydrogen has on other gases buy placing a propane torch over a open cell [no preassure or enclosier] and it deffinatly makes the gas burn faster. It would cut the lenth of flame in half showing a quiker burn.