So, apply it to the section, then use the SC? Then apply to next section, etc? Or apply to entire concrete pad and then start using the SC? Rinsing that 1st section would also remove the chemical from the areas/sections in the runoff path. This is what got me confused so I skipped it.Lowes sells pool bleach that is 10.5% SH by the gallon. I would have just used the house mix to give it a little something to kill the organic crud.