Filter refill bag for the long-lasting Aarke Purifier & ReFilter system. The granules reduce unwanted substances, add magnesium and convert tap water into alkaline water by increasing the pH value. Filters up to 3x120 litres of water. This is the improved and enriched version of the Aarke Pure filter granulate with additional benefits. Produced in co-operation with BWT, one of the world's leading water technology companies.