ALGICIDE CONCENTRATE This is a specialised complex formulation developed for the destruction and control of algae in all types of swimming pools. » BLACKSPOT GRANULAR Treatment designed to clear up even the worst case of blackspot from the surface of white plaster, tiled and pebblecrete pools. » HYDROCLEAR Treatment is effective against black algae green & brown varieties. » POWERCIDE 4 Product that can be used for the removal of blackspot algae in swimming pools. »