PDZ is zeolite. It is used in fish tanks etc. to clean the water. It is used in stables to remove the ammonia from horse urine - same principle with chickens, ammonia removal.What is PDZ how much does it take & how much does it cost?
You can get it at a farm store, I have no idea how much it costs. To me, it is simply postponing the fact that you need to clean the coop.