Gross! Also… a sizable percentage of the granules get flushed down the toilet. I haven’t investigated those accurately… but I'm able to’t consider that it's good for your plumbing. The granules seem to be plastic. Probably they biodegrade? Idk.. not my fav. We've been looking in to other devices. Although https://myfirstbookmark.com/story20217917/the-definitive-guide-to-petkit-purobot-uae