Instructions: Fill litter box with at least 1
1/2 - 2 inches of Fresh Step Crystals Health Monitoring Litter. Scoop solids and stir litter daily for maximum performance. Dump and refill every 20-30 days or as needed. Do not flush. To introduce litter, place a new litter box of crystals next to your current one, OR mix crystals with your current litter for a few days before the switch. Once your cat accepts Fresh Step Crystals Health Monitoring Litter, we do not recommend continuing to mix it with other litters.