So you are saying stick with the liquid pool shock itz 12.5 with a cleaner on vinyl,i have the granulated itz calcium hypo i have never tried it itz 75% chlorine the granulated is.
You get that on some slabs we do about 80 percent slabs,it is like a light finish sun might pull it out turn your surface cleaner on it's side before turning the ball valve broomed concrete is trickey.