Try Praxair in Delta, that is there gas plant with a store front, and they have food safe liquid c02.
they might get you to leave your 10 # or 5 # cylinder and , pick it up later. They have 20# for sale and exchange.
co2 is co2 , the only thing that makes it food grade is the cylinder. steel cylinders can have rust in it. alum is why they can call it food safe.
co2 is in liquid form, and naturally turns to gas.that's why the cylinders are rated in lbs
To transfer co2 from one tank to another, the correct...