Maintaining the perfect chlorine levels will make sure that your pool remains healthy. Our Chlorine Granules are super easy to use, so it's never been easier to keep your pool hygienic! Your pool's pH levels are crucial for healthy water and a healthy hot tub! That's why we've made sure our Chlorine Granules won't disturb the gentle pH balance of your pool's water. To make sure that your pool is always as clean as possible, these cleaning granules produce free active chlorine (FAC), which kills nasty bacteria and harmful organisms. This will actively help with removing germs and bacteria, making the pool a lot cleaner. These granules have been manufactured with a stabiliser to help prevent the destabilisation and destruction of the chlorine by sunlight and UV rays. This prolongs their usefulness as a sanitiser over other types of non-stabilised chlorine and makes them ideal for use in swimming pools, spas and hot tubs whether located indoor or outdoor. ProKleen Stabilised Chlorine Granules for Hot Tubs, Spas & Pools 1 x 5KG in Clear