Complete care for swimming pools of up to 30 m3 that use sand filters. Three functions in one package: Continuous disinfection with slowdissolving chlorine, algae prevention (foam-free), and turbidity removal flocculation agent. Package size : 1 kg cartridge A complete treatment In one fell swoop, the Multilong cartridge ensures: 1. continuous disinfection, thanks to the slow dissolving chlorine 2. instant disinfection, thanks to the fast-dissolving chlorine 3. algae inhibition, thanks to a highly efficient non-foaming algaecide 4. continuous water clarification, thanks to the slow dissolving flocculant