How can I get rid of algae and lichens that are on my sidewalk?
Does anyone have a way of getting rid of algae and lichens on my sidewalk. Tried bleach, peroxide but did not work. Thank you.
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You can buy Moss Out in a hose attachment bottle, then follow-up with a stiff garden brush to remove any leftover debri. Its sold in the garden centers of most home stores. It also comes in a large shaker bottle.
Mechanically remove it, with a steel bristle brush, then treat it again with bleach. It is in the pores of the concrete.
I have power washed with bleach.
Chris,
Unless you change the conditions allowing the algae and lichens to grow (moisture and not too much sun), they will simply keep coming back over time. You might find this article helpful:
https://www.finehomebuilding.com/2017/09/07/lichen-moss-roof-remediation
power wash or use a deck cleaner and scrub it off.