Gross! Also… a sizable portion of the granules get flushed down the rest room. I haven’t investigated Individuals accurately… but I'm able to’t imagine that it's great for your plumbing. The granules appear to be plastic. Possibly they biodegrade? Idk.. not my fav. We're looking in to other systems. But https://myfirstbookmark.com/story20235523/the-smart-trick-of-robotic-pet-cleaning-that-nobody-is-discussing