A ready to use, dry calcium hypochlorite product which produces a chlorine solution for disinfecting pools and spas. 70% average available chlorine content. Suitable for hard and soft water, with a built-in anti-scale formula. Stabiliser free. A unique pillow shape design which assists with enhanced dissolving efficiency, ensuring a more even and consistent chlorine solution. Can be used in conjunction with the hth Easiflo briquette feeder range for perfect water quality.