Like I was saying I'm a construction worker and I work with tanks all day from Little Map Gas Propan etc. I love Fluval and I like the idea of providing my plants with CO2 my only complaint is the tanks are awful small and the nut for the regulator is hexagon and smooth so when you put your hands in the tank to try to make a 1/32 of an adjustment it's not a quite easily I'm not sure who thought of that but I digress I just want to know do I need to go to Home Depot and get creative with brass fittings in order to get the acetylene tank once cleaned out filled? I'll find a distributor that can fill the tank I just want to do this safely cuz it's going to be about thousand 1000 PSI, thanks Steve.