Gross! Also… a sizable portion of the granules get flushed down the rest room. I haven’t investigated Those people exactly… but I can’t picture that it is great on your plumbing. The granules appear to be plastic. Probably they biodegrade? Idk.. not my fav. We're looking in to other devices. https://petskyonline-onlinestrore.blogspot.com/2025/07/petkit-purobot-ultra-premier-auto.html