Clearwater CH0041 5 kg Multifunction Chlorine Tablets, 4-in-1 Dispenser Tablets (Sanitiser, Stabiliser, Algaecide and Clarifier) for Pools and Hot Tubs, 250 x 20 g

multiple beneficial effects - they contain chlorine which kills bacteria and disinfects water algaecide which kills and prevents the build-up of algae and clarifier which can clog up a pool's filter. This easy to use tub contains 250 mini tablets. A cost effective way to buy pool chemicals.