I was just planning on using the CO2 as a top-gas at room pressure on an opened bottle to keep oxidation down. Will it still absorb the CO2 without pressurization and will that affect the taste? Otherwise, I will use argon if its better.
CO2 is actually heavier than argon (44 vs 40 amu or grams/mole). I am looking for a good source of top-off gas and was considering using a CO2 tire bike tire inflator (much cheaper than an argon kit). Anyone else use this?