Green and black mildew on lanai
I have a SW facing lanai with a hot tub in it and a courtyard wall behind it. I powerwash it twice a year but very quickly I get green and black mildew buildup on the cement floor, especially around the hot tub all the way to the lanai screens and on the back of the house. Does anyone know of anything I can do to keep this from happening? Anything to wash with to keep this from happening? Keep in mind I have a cat and dog that go out there so I have to be careful with chemicals.
Thanks
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