Graphite 18" wall brush aluminium - curved CCMG51Swimming pool walls should be regularly brushed to prevent the build up of algae. For stubborn algae growth on the walls of concrete pools, use an algae brush with stainless steel bristles to make cleaning easier. The Certikin Graphite range of swimming pool maintenance equipment is manufactured in an attractive graphite grey colour. The Graphite range is strong, durable and designed to Certikin's exacting standards.