I was using the bleach calculator to figure out how many gallons to add to get the chlorine to 25ppm from where ever it was, usually somewhere between 8 and 10ppm when I tested each evening. I would add the allotted number of gallons, wait about 15 to 20 minutes for it to mix and then test but the numbers have been coming up short. I thought I might have made a mistake when I measured the pool, so I remeasured and I was off - 13000 instead of 17000 - but that told me that my Cl should have been much higher with the smaller volume, so I'm wondering if the bleach I'm getting is actually 6% as stated on the bottle (3/4 gal). I have been getting it at Aldi since that was the cheapest around right now. Is there a way to test the bleach concentration with the taylor kit to find out how strong bleach is? Or is there another test available to do that? I want to make sure I get the most bang for my buck since I am buying so much every day.