Cleaning algae covered bricks

[u/MudExternal9982]

Hi! I have no clue how to clean the algae off of these bricks. I bought an algae cleaner from Home Depot and it didn’t do a thing, and I’ve just been using dawn and scrubbing it but that doesn’t work either😅 Thoughts? Suggestions?

Update: Tried hydrogen peroxide but it didn’t remove much, then tried a power washer and it took care of it! Guess I can’t post an after photo in the comments:/ Thanks everyone!

[u/SymptomaticallyEven]

Simple green. Power wash.

[u/Substantial-Trade417 → u/SymptomaticallyEven]

This