I'm only using 300cc absorbers, and use 3 per 5 gal bucket. Maybe, I do need to go back, and put more in?
Where can I find half gallon jars besides Walmart? I would never order them online, because of breakage.
I don't remember off hand what size O2 absorbers I used, but they were on the small side - maybe 50 or 100cc. I know the pamphlet I got had a chart of how many of what size to use. It also depended on what you were putting in the container. Something like flour had way less oxygen than say egg noodles, basically the more empty space you have = more oxygen you have to get rid of. I'll see if I can put the chart on here later tonight.
I got my half-gallon jars at an Ace Hardware near me (Maryland). But that was about a year ago. I saw the initial indications of COVID here on TB2K (thanks!) and bought a couple more cases of various sizes.
Edited to add - I'm not sure how well a 5 gallon bucket will actually stay sealed tight. Maybe if your buckets have those gamma-seal lids or what ever they are called. I think most people use big mylar bags inside of a 5 gallon bucket and seal the mylar bag. The bucket is just a convenient way to package it up. But I've never done anything on that scale, so I could be completely wrong on that.