Gross! Also… a sizable percentage of the granules get flushed down the toilet. I haven’t investigated These accurately… but I'm able to’t visualize that it is good on your plumbing. The granules appear to be plastic. Perhaps they biodegrade? Idk.. not my fav. We've been seeking in to other devices. https://petskyonline-onlinestrore.blogspot.com/2025/07/petkit-purobot-ultra-premier-auto.html