BioAdvanced 2-in-1 Moss and Algae Killer and Cleaner for Lawns, Roofs, Patios, Decks, and More, Ready-to-Spray, 32 oz

This product is extremely easy to use, and highly effective. Simply hook to the end of your hose and go.I had a nasty build up of moss on my nice new roof, and after 2 or 3 days of spraying it, all the moss was turning brown. Within a week, it was dead.I’m including Before and After photos that tell the tale.(And yes, the fronts of my gutters need to be power washed! That’s coming in two days from today. üëç)UPDATE: I just added the “After” photo. The moss killer did its job as advertised. The power washing then physically removed the dead moss. And I had a gutter guy add a section to connect the downspout from the 2nd story to the horizontal 1st-story gutter to help keep that area more dry.And note the fact that this product will kill moss, but does not make what remains magically disappear. You must mechanically remove the dead moss, and my power washer man made a point to tell me how firmly it clung to the shingles. This is not a ding on this product. Just a fact in dealing with moss. Even dead, its tiny roots still grab firmly to hard surfaces.Seeing this product is so easy to apply, so effective, and inexpensive, I plan to apply it every Spring and early Fall, or at least once every Summer.5 STARS