Fi-Clor Supercapsules can be used as a regular pool sanitiser - they are especially recommended for pools that are open all year round. They are enclosed in a protective plastic sleeve making them easy to handle. As the capsule dissolves, chlorine is released from each end of the sleeve. The surface area of the capsule exposed to water remains constant so, unlike normal 200g tablets, you get an even amount of chlorine going into the pool from start to finish. These calcium hypochlorite Supercapsules contain 65% available chlorine, no stabiliser (cyanuric acid) and will not contribute to chlorine lock. Each capsule weighs 300g and should last 3-5 days depending upon water conditions. > For maximum efficiency stabilise the water at the beginning of the season with Fi-Clor Chlorine Stabiliser. Alternatively, use the capsules in conjunction with Fi-Clor Premium 5 multi-functional stabilised chlorine granules which will contribute sufficient stabiliser to guarantee optimum performance after a short period of use. Do not mix these products