Using Bleach

[PoolDoc]

Watermom, please note that readings like CYA=37 usually means digitally read 'guess strips', which in turn usually means bogus dealer testing.

As you know, the best real test are, at most, plus/minus 10ppm . . . and strip based CYA testing tends to be plus/minus 30 - 40 ppm. So, when you see impossible results like 37 -- instead of 30 or 40 -- it means the digital reader is 'making up' the extra digits so the test results look much more accurate than they really are.

Ben