Amazon.com : TonGass Reusable Self-Cleaning Cat Litter Box Tray Refills with 4.5LB Crystal Cat Litter Compatible with PetSafe ScoopFree Automatic Cat Litter Box (Beige) - Fits All 1st and 2nd Gen :
Amazon.com : PetSafe ScoopFree Crystal Cat Litter - 5x Better Odor Control Than Clay Litter - Less Tracking & Dust For A Fresh Home - Non-Clumping - Two 4.3 lb Bags Of