How to Remove Algae With a Brush

Any type of stiff-bristled brush will help remove algae.

A stiff-bristled brush removes algae by loosening the plant from the surface. By adding bleach or vinegar, the algae comes off faster. Choose a brush that won't scratch the surface you are cleaning. For example, don't use a metal wire brush on plastic surfaces; however, you can use that type of brush on stone or concrete. After the cleaning is done, it's vital to remove all the algae from the brush. If you don't, it will grow on the brush.

Things You'll Need

• Spray bottle
• White distilled vinegar or bleach

Instructions

1. Fill an empty spray bottle with vinegar or bleach. Do not combine the two liquids; combining the two creates toxic fumes.

2. Test an inconspicuous spot of the surface (especially if you are using chlorine bleach). Spray a little bit of the liquid on the surface and see whether it discolors it or harms it in any way. If not, you can proceed with the removal process.

3. Saturate the area with the liquid. You will see some of the algae start to die.

4. Hold the brush bristles on the algae. Move the bristles in circular motions over the algae until all the algae is gone.

5. Rinse the area with water. Rinse the brush until all the algae is gone. Place the brush in the sun to dry.

Tips & Warnings

• You can use oxygen bleach as an alternative to chlorine bleach.

References

• Ask the Builder: Removing Moss and Algae from Roofs