Mainland Welding in Surrey has Steel 5lbs cylinders for $89.95 the fill was $20... can't get the tank with out the fill.

Anyway, thats what I did, the LFS has aluminum ones and they are more expensive. I'm trying to cut down on my expendatures.

How long will a 5lb bottle last ??? Thinking about a calc. reactor!!

My 5lb bottle lasts about 5-6 months

I can tell you when my bottle needs to be refilled..... at 19 bubbles/minute thats going to take some time...