I wanted to buy Stall Dry which I believe is a mixture of DE and clay but instead, bought Dry Stall which is volcanic aggregate. Dry Stall (volcanic aggregate) looks like small tiny crushed rocks and thinking it was the same thing, I added it to the sand in my run. I really wanted to use it to control odor and flies in my run. It is not the same. Can I now add Stall Dry? What would happen if I mixed it? Should I remove the Dry Stall? What about composting later in vegetable gardens. Is it safe?