Glad to see the gardening application info, thanks @FridayYet.
ETA: don't see a place to purchase and am curious about their cost.
Knew the PDZ was probably safe for the garden/compost, and figured but didn't know if the nitrogen absorbed in it would be available to plants or not.
I use a lip on board and is lined with vinyl sheet flooring which also helps with 'sticking', especially in winter.
Gets sifted out 2-3 times a week, depending on population, and goes to a friends compost.
Mixed with sand and about a 1/4" - 1/2" deep (any deeper and they tend to dust bathe in it) it lasts a long time just needs topping off once in a while.
According to this link, the nitrogen absorbed by the zeolite becomes available to plants over time to prevent burning: http://www.bearriverzeolite.com/molly_magic.htm I order mine through Azure Standard since that is where I get my chicken food every month or, If I go to TSC, I just pick up a bag of Sweet PDZ there. I also have a pile of very sandy soil in the back, almost straight sand that I'll mix in once in a while to "stretch" the PDZ.
Well that's my plan, but that project keeps moving down the list Maybe this winter?