Zeolite is a natural mineral that can improve soil structure in organic gardening. My chicken manure and PDZ go directly into the conpost, and eventually into the garden.
I read about stretching the PDZ with sand here on BYC. Without enough PDZ, I wasn't happy with the odor control since the PDZ is the part that neutralizes ammonia. A friend uses pelletized gypsum on her poop tray, so I bought a bag of that and mixed it in. It's great for the garden but not real...
On my poop boards I use a mix of granulated PDZ, coarse sand, and pelletized gypsum. It gets scooped once or twice a week and the droppings go into the compost pile.
Love it, works well for me, and I would recommend it to others.