Quote Originally Posted by blessedbeingmom View Post
Okay, this morning at 9 a.m. after getting the reading of 13 ppm, DH added 2 quarts of bleach, which should have brought it to 19 ppm. He checked it just now (a little over 2 hours later) and it's only 11! Yikes! What is going on???
Okay, we just did CarlD's chlorine test on our bleach, and it only came to 3.5% bleach. Maybe our bleach is old and that is part of the problem???

http://www.poolforum.com/pf2/showthread.php?t=10167 (CarlD's chlorine test)

How do we make sure we're buying fresh bleach?