Gross! Also… a big percentage of the granules get flushed down the bathroom. I haven’t researched Those people just… but I can’t imagine that it's excellent for your plumbing. The granules appear to be plastic. Maybe they biodegrade? Idk.. not my fav. We have been seeking in to other systems. https://socialrator.com/story11353654/the-basic-principles-of-petkit-purobot-uae