Gross! Also… a significant part of the granules get flushed down the toilet. I haven’t investigated People exactly… but I am able to’t envision that it is good for the plumbing. The granules appear to be plastic. Probably they biodegrade? Idk.. not my fav. We're hunting in to other systems. https://petskyonline-onlinestrore.blogspot.com/2025/07/petkit-purobot-ultra-premier-auto.html