Pressure washing only strips away the top of the algae bloom, or moss infected areas. Roots of the infestation are still within the surface you are cleaning. Power washing blasts the pores deeper into the surface. For example, when you mow your grass on a regular basis, it grows back thicker and healthier, and when you prune your hedges on a regular basis, they grow back thicker and healthier. Likewise, when you power wash your algae on a regular basis, it grows back thicker and healthier. It’s a lot like giving it a haircut, and then spreading it around. Soft washing is the best alternative to pressure washing. Soft washing treats the infestation at the root, and does not cause any damage from pressure. The cleaning solution offered by soft washing is a more sustainable cleaning model above and beyond aesthetics.