MOSGO Algae Remover (Red & Green) 2.5LtrMosgo Dual Active Algae Remover 2. 5 Ltr Algae Remover Special formula for red and green algae Effective pre painting treatment Year round application Mosgo Algae Remover, removes green or red discolouration caused by algae and prevents it coming back. Ideal for creating a clean base before painting walls. Mix 1L product with 5L of water to cover 14m2. Apply using a sprayer or a brush, allow to dry in, no need to rinse. Use on a dry day from Spring to