Gross! Also… a sizable percentage of the granules get flushed down the toilet. I haven’t researched Those people specifically… but I am able to’t envision that it's great in your plumbing. The granules seem to be plastic. Possibly they biodegrade? Idk.. not my fav. We have been looking in to https://johsocial.com/story10784290/what-does-automatic-litter-box-mean