Dual Active Algae Remover | F1012 Special formula for red and green algae Removes mould from exterior walls Effective pre-ting treatment Kills and prevents regrowth Size: 5 Litres Leave-on formula - no power washing or rinsing required, simply apply and allow to dry in Pre-t wall treatment - wait 48 hours for heavy growths, then t directly over the treated surface Mosgo Dual Active Algae Remover 5 Litre | F1012 A fantastic algae and moss remover, Hygeia Mosgo Algae Remover controls red and green algae discolouration on exterior walls and hard surfaces. Mosgo Algae Remover, removes green or red discolouration caused by algae and prevents it coming back. Ideal for creating a clean base before ting walls. Mix 1L product with 5L of water to cover 14m².