Recommendations on how to treat Wooden dock in florida

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Deck Cleaning 101

[IMG_20201122_105116] [IMG_20201122_134732~2] IMG_20201122_112846|375x500 I cleaned this with sodium metasilicate/ hydroxide Everett sells. Is that green between the X’s pressure treatment or alage I didn’t remove? I enede up brushing most of the deck becuaenafter coming through with 1000psi some green was left behind. I would go across board again slower and it would remove more. Ultimately brushing right before the rinse helped. To get rid of outdoor Matt shadow, only thing you can do is s…