Same here. Amazon.
I bought the heavier bags to fit a 6 gallon bucket. I seal them with a 2 ft aluminum level across the top of the bucket with an iron.
By leaving the lid off the bucket overnight I can see the vacuum seal as the oxygen is used up.
I do buckets in batches of 10 to use an entire pack of 10 O2 absorbers.
This way the mylar bags are resealable several times and still fill a 5 or 6 gallon bucket.
Anyone experiment with making O2 absorbers. The bags and absorbers are all made in china.
are you using ordinary bucket or gamma seal?
The absorbers are iron. The iron reacts with the O2 to form rust. Do a search to get finer details on DIY.