Gross! Also… a sizable part of the granules get flushed down the bathroom. I haven’t investigated those exactly… but I am able to’t picture that it's great in your plumbing. The granules seem to be plastic. Possibly they biodegrade? Idk.. not my fav. We are hunting in to other methods. https://petskyonline-onlinestrore.blogspot.com/2025/07/petkit-purobot-ultra-premier-auto.html