Can I use the “Pretty Litter” brand crystal litter?
I ready like it and do not want to go back to clay based.
Thanks
Hello @Kenichi 
The description of the Litter-Robot III states:
The Litter-Robot works well with almost any clumping or scoopable litter. Litter beads and crystals that are small enough to pass through the screen will also work. Alternative, plant-based litters may also work, but these tend to form looser clumps that can cause condensation in the waste drawer. When using a plant-based litter, we recommend emptying the waste drawer and cleaning more frequently. The Litter-Robot is not compatible with litters that are strictly absorbent, non-clumping, loose clumping, newspaper-based, or wood-based pellets. You’ll find these incompatible litters create a muddy mess and interfere with the sifting process.
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