Here is a useful chart with recommended oxy absorbers to use for different size containers and different types of product.
While you are there check out theiir prices on 5 mil bags and oxy absorbers.
USA Emergency Supply
https://www.usaemergencysupply.com/emergency_supplies/oxygen_absorber_recommended_amounts.htm
Every reference I have seen says you cannot use too many - if you go over the recommended amount it doesn't hurt anything.
I did 5 gal buckets with 20 pounds of elbow macaroni using 2,000 cc oxy abs. in each and they came out rock hard.
Don’t buy 02 absorbers!
Wait until “hothands” go on sale. They’re the same thing - iron filings.
There’s a couple sections in my Preparedness Manual with reconmendations and instructions for storing food buckets.
The manual can be downloaded here:
http://tomeaker.com/kart/Preparedness1j.pdf