Gross! Also… a sizable portion of the granules get flushed down the bathroom. I haven’t investigated These specifically… but I'm able to’t imagine that it's fantastic to your plumbing. The granules seem to be plastic. It's possible they biodegrade? Idk.. not my fav. We've been searching in to other systems. https://petskyonline-onlinestrore.blogspot.com/2025/07/petkit-purobot-ultra-premier-auto.html