Hi,

I've got the beginning of an algae problem. I'm working pretty constantly to keep it at bay, but the surface of the pool is generally going a bit green-ish at least once a week. So what I could find was HTH super algae guard. I'm going to use it as recommended on the container, but when I look at the ingredient list, it's got 2 of them at 30% each making up the 60%. I guess I'm posting this because the formulation may have changed - it's a slightly different name than your picture.