Filter Aid, Product Label D.E. Media and Filter Aid, Container Type Box, Container Size 24 lb, Cleaner Form Granular, pH Value Alkaline, pH Level 8 to 11, Standards California Proposition 65 Compliant, Biodegradable No, Calcium Free Yes, Color White, For Use With DE Filter, Fragrance Unscented, Phosphate Free Yes, Primary Chemical Cristobalite, Diatomaceous Earth, Properties Calcium Free, Phosphate Free, Salt System Compatible Yes