Green deposits can be removed with Lithofin ALGEX. Simply dilute the product 1:10 with water and spray it onto the surface. This product also serves a preventive function. To ensure a clean surface, you should spray it with Lithofin ALGEX once a year, preferably in spring.
Cleaning the surface with Lithofin MN Outdoor Cleaner will restore the surface to its original condition. After one to two weeks, you should treat the surface with Lithofin ALGEX as a preventive measure. To ensure a clean surface in the future, you should spray it with Lithofin ALGEX once a year, preferably in spring.
It is best not to do anything. You probably used Lithofin ALGEX in too strong a concentration, which made the algae turn brown. You can either brush with some water or wait for the rain to solve the problem.