Originally Posted by evrose
You don't need medical grade. Most Home Depots or Lowes carry small O2 tanks that work just fine.
At $10 per bottle and 29 for the regulator...
Unless your only doing a few batches.... To me it makes more sense to find a used welding tank regulator and and small 80 cf or so tank....
Easy for me to say I guess since I have a few welding O2 tanks at the house all the time... But still.. $10 for $.60 of O2 just sucks.