Testing cheap bleach

[dansdad]

ok now I took 1 liter of water and 10 ml bleach and mixed. THEN 10 ml of THAT mix to 1 liter of water, mixed and tested it using 25ml procedure using the 2006. My test which I ran twice came out to .8 Is that bleach that weak? Or should I try 25 ml of the bleach and run the test? I'm kinda at a loss here

[CarlD]

I think you should add 1 ml of bleach to 10 liters of water (less than a 5 gal bucket full) and THEN run your test.

[dansdad]

I will do. I'm doing something wrong. Bleach can't be .8, so I'll do as you say and get back...dave

[CarlD]

Actually, it can be. Liquid chlorine can break down when exposed to light and heat, especially light. But usually high concentration bleach or LC is more vulnerable than low concentration bleach. Just not likely. Still, I've gotten 12% LC that didn't even test at ten, from the now-defunct Branch Brook Pools, and 12% that tests at 14.5 from Sun Pools. The latter consistently tests high...VERY high turnover of their stock.