How to Use Bleach As Algaecide


Algae is a common concern for many homeowners, as it grows steadily on a variety of exterior surfaces. When the conditions are damp and shady, algae can quickly pop up and spread steadily You do not need a commercial algaecide to remove the algae effectively, though. In fact, with a household bleach solution, you can quickly spray the covered surface and prevent the algae's return in under 30 minutes of work.

Things You'll Need

  • Garden hose
  • Drop cloths
  • Bleach
  • Water
  • Bucket
  • Paint stir
  • Rubber gloves
  • Pump sprayer
  • Nylon brush
  • Power washer
  • 40-degree fanned tip
  • Spray surrounding shrubs and plants with water to protect them against the bleach application. You can further protect them by covering them with drop cloths.

  • Mix one part household bleach with two parts water in a bucket. Incorporate thoroughly with a wood paint stir.

  • Protect your hands with rubber gloves and then carefully pour the bleach and water mixture into the top of the pump sprayer.

  • Prime the sprayer as directed in the user instructions and then hold the wand 4 to 6 inches away from the surface and coat it with the bleach solution.

  • Wait 12 to 15 minutes for the bleach to break apart the algae. Scrub it thoroughly with a stiff nylon-bristle brush to remove.

  • Rinse the surface free of the bleach and algae with a garden hose. You can also employ a power washer with a 40-degree fanned tip attachment.

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  • "Complete Do-It-Yourself Manual: Completely Revised and Updated"; Editors of the Family Handyman; 2005
  • Photo Credit Thinkstock/Comstock/Getty Images
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