I'm still in the early stages of testing guys, things are looking good at about the 30 day mark. I was having to re-treat with bleach every couple of weeks in spots that stayed pretty wet and didn't get much sun. I guess it depends on how busy the place is and how wet the area stays. What caught my attention is even the SS bay floors are looking cleaner than previous Summers. What I thought was just general dirt must have actually been mildew.
Randy, Wet and forget has the same active ingredient as this. It's just less concentrated, I think it is around 10% where the pool algaecide in the link above is 50%.. These two quarts can mix up 16 gallons total of solution at a final cost of around 2.50 per gallon, roughly the same cost as 6% bleach diluted with water I guess .
Again, it's not magic and the green doesn't disappear before your eyes like bleach can do. But just another tool that is potentially a little easier to use(non corrosive neutral ph) and hopefully longer acting. It's nice to spray something overhead without worrying what clothes you're wearing too. I sprayed it on the upper parts of my cloth units which actually had moss growing on the very tops. I rinsed everything off, and re applied the product to hopefully retard future growth. I'll try to report back in a Month or so.