I use it in combination with my favorite clay litter, Ever clean, because it is too expensive on it's own and doesn't do a good enough job of covering smell.

If you want to use it on its own you need one package every week, it is effective for smell for that long. Clumps well, does not track.

If you have a normal wallet like me, use 50/50 clay/tofu and use this to stop sand from spreading all over your house! The pellets hold down the sand and stop it from going everywhere in my house, I use half a package every two weeks.