Gross! Also… a substantial part of the granules get flushed down the toilet. I haven’t researched Those people just… but I can’t consider that it is good for the plumbing. The granules appear to be plastic. Perhaps they biodegrade? Idk.. not my fav. We're searching in to other devices. Remember https://thesocialdelight.com/story5748264/the-single-best-strategy-to-use-for-petkit-purobot-uae