Return to the Cleaning Tips Forum | Post a Follow-Up

Best way to clean algae off flagstones and rock walls?

Posted by rooster99 (My Page) on
Sat, Jul 9, 11 at 20:42

We have several areas where algae builds up due to lack of direct sunlight and a cool/wet climate. We need to clean it off.

I don't want to pressure wash as last time it washed a lot of the grout/sand away from between the close fit flagstones. I shudder to think of the effect on the dry stack rock walls.

I'm nor afraid of adding elbow grease to the mix or having to do it every spring, but want something effective and friendly to both our garden and little dog. I've read suggestions of cider vinegar, TSP, and a potassium based soap that is sprayed on from Planet Natural. But nothing stands out and would prefer to minimize experimentation.

Any ideas?

TIA - R.

Follow-Up Postings:

RE: Best way to clean algae off flagstones and rock walls?

We have used Wet it and Forget it with great success.

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Cleaning Tips Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here