Spray & Forget, 32 OZ, Ready To Use, House & Deck Outdoor Cleaner, Removes Green & Black Stains Caused By Algae, Mold & Mildew, Attaches To A Garden Hose, Reaching The 2nd Story & Treating 400 To 600 SQFT, No Rinsing Is Required, Continues Cleaning Long After The Application, Use It On Brick Walls, Decks, Fences, Driveways, Walkways, Siding & Stucco.