So I added 3 gal of bleach last night to shock the pool to 15 trying to head off a problem that may be brewing. It's too high to read on my little HTH kit so I did the shot glass method. So now my color is in between the 3-6 and 5-10 range. This means I have somewhere between 6 and 30ppm. Wow, that's helpful. Is Ben's kit any better at pinning down an exact ppm?

Shelley