I’ve never heard of anyone else using this but I started trying it last year.
I’m using a couple of these rehydrated in my bags of scion. You don’t need many…one or two in a small ziplock with a few sticks. I had some in the last years scion that I just threw out. Actually a lot of that wood was still green and moist this year. I keep a bag of hydrated beads to use as needed.
These give up water and shrink as they dehydrate so you can tell if they need replacing. It’s easy to put too many in the bag and then it gets wet in there.