Kolar Labs - DI Color Changing Deionization Resin – for Fish Tanks, Ponds & Aquariums, Reef Aquarium Grade (3.4kilo, 7.5lbs)

PREMIUM GRADE: 3.4 kilograms; 7.5 lbs (6 canister refills), High-capacity, mixed bed, virgin nuclear grade deionization resin; Manufactured to the highest degree of purity FRESHNESS GUARANTEED: Packaged in vacuum sealed mylar bags to preserve freshness and shelf life LOWERS TDS TO ZERO: Removes TDS left from RO filtration systems; Creates ultra-pure water COLOR CHANGING INDICATOR: Changes from purple to brown when exhausted SAFE FOR ALL AQUARIUMS: Creates a consistent, safe, ultra-pure water that can be used for all freshwater and saltwater aquariums and ponds