Your posting sounds weird. "Yes, argon is heavier than air, but there's this thing called diffusion." What has diffusion to do with it? Nothing. Most diffusion

Your posting sounds weird. "Yes, argon is heavier than air, but there's this thing called diffusion." What has diffusion to do with it? Nothing. Most diffusion effects in our life are negligible because of convection. I had to check how much argon costs. It is indeed not very expensive. Why do you need medical grade? What "toxins" do you expect? This is an overkill for 99% of the population. Does your wife ask "Did you argon the olive oil?" too?