My husband has said the same thing. We are working on getting Azure Standard where we are in MD. He is considering making our own. I am still ordering Koop Clean until he does and gets it to work as well. It is harder to find super dry, hay clippings or heat treated hay. The heat treated hay is part of the magic.I don't see why one couldn't concoct their own version of Koop Clean, say with:
* Pine Shavings (or sand)
and
* Zeolite: https://www.azurestandard.com/shop/product/12134// ($13 for a 50lbs bag, aka $0.26/pound)
or https://www.azurestandard.com/shop/product/12136// ($7 for a 22lbs bag)
This would last a VERY long time. Koop Klean sounds like a great product and it will be ideal for some folks to pay for it already mixed and others would like to be as frugal as possible.
Yes, you need to join Azure Standard, which isn't everyone's bag of tea because it's not as convenient as just running down to the nearest big box store, nor do they deliver everywhere in the USA (most everywhere but the east coast). But this rather generic zeolite is the same thing as Sweet PDZ, at a much lesser price.
Bear River Zeolite:
Volcanic rock called zeolite is mined in southern Idaho from a huge deposit at the Bear River Zeolite Mine. It has the ability to hold up to 55% of its weight in water in channel ways. It also has the ability to hold nitrogen, potassium, and calcium in its crystal structure where they are plant accessible but not water-soluble. This creates a time-release mechanism to prevent pollution and the burning of the plant by nitrogen.
"FARM ANIMALS - to absorb moisture and deodorize horse stalls, pig pens, chicken coups, rabbit hutches, etc."
...Ah, that's what happened, my chickens have formed a coup!!