GLB Stabilized Chlorinating Granules are effective as a swimming pool water sanitation agent. It has 56% chlorine available and is fast dissolving with no scale forming minerals or insoluble. This totally soluble product will not cloud the water, is relatively pH neutral, and has a long shelf life. No floaters or feeders are necessary with this product. Because this product is stabilized, it is longer lasting against the degradative effects of the sun’s ultraviolet (UV) rays. Kill harmful bacteria growth in your pool with this product.