Ok, so if it's supposed to be 17%, then I should get a reading of 17 ppm, correct? Hey, my son's the math major, not me.

So, after my first post I decided to check out the Hasa website and their MSDS page, I didn't find any of their sodium hypochlorite products that showed any higher than 12.5, which until now is the highest I've heard of. I won't be getting this stuff until next week so it will be a while before I can confirm it. I guess I'm wondering if this guy is blowing smoke, are higher concentrations even allowed? I know you've measured 14%, but it's sold as nominal 12.5, right?

Dan