I tested this evening found I was at 10ppm, about sunset put in a small bottle of 6% (2.84 gal). My Dad complained about the cost of bleach. I invented a weighted cup on a string to get a deep sample without kneeling. Went over at midnight and tested - damn its dark out there- looked like I was at 15 to me - why can't we have a hand tester for this stuff (wish I could invent that). Anyway I still had a couple of quarts of old open bleach from last year (old Walmart - I had 4 bottles of the 5.14 liter size and there is no indication of strength - just says Great Value Ultra made in Canada - this years stuff is marked 6%). So I tossed that in before I split for my quarters. Tomorrow we will vacuum if it doesn't rain too hard.
Karen