PrettyLitter is engineered as a complete litter solution for your household and is not intended to be mixed, blended, or combined with other silica or crystal litters. The silica gel crystals of PrettyLitter were carefully designed to be health monitoring and mixing with other litter may affect the color change results.
Mixing or combining PrettyLitter with other litters is only suggested as a temporary, transitionary step when acclimating a cat to a new litter solution.