Biocel MAK Green Algae Remover 5LAlgae Remover, removes green or red discoloration caused by algae and prevents it coming back. Ideal for creating a clean base before painting walls. Kills and prevents regrowth of algae and lichen which causes red and green discoloration on houses. Mix 1 part Mosgo Algae Remover with 5 parts water and apply the combined mixture to area. Apply with brush or sprayer. Protect growing plants from direct spray. If spillage does occur wash off with water.