Pavers on patio have green on them
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I get the same thing on my patio which is shaded. Power washing does the trick and if that doesn't work well enough, try some bleach water and scrub with garage broom.
Hello Marcue, Power washing helps with such moisture related issues. Sometimes a commercial cleaner could be necessary.
Mold of some sort, algae, spray with vinegar, let sit for a bit and rinse. Repeat when needed.
I usually just mix up some bleach and water, or sudsy ammonia and water (don't mix the two) and pour it on and use a stiff palm brush to scrub and hose off.
Algae, power washed it off my aunts deck and my house. See if a neighbor has a power washer and will let you use it. If not, my local lumber yard rents them Out by the hour, I’m betting one near you is doing the same thing.
It's green algae, simple to remove. You could mix up a solution of bleach and warm water, pour it on and use a stiff brush to scrub it off, but we use a pressure washer which works just as well.