Quote Originally Posted by jeremyweber View Post
Do you stop when the dot is completely hidden or when it's fuzzy?

When it's hidden.

1) shake the mix of pool water and reagent for at least 30 seconds.
2) Stand facing the sun.
3) Hold the measuring tube at waste level and SLOWLY add the mix till the dot
disappears.
4) Dump the mix back into the vial and run the test a second time with the same
mix.
5) Perform the test the same way every time.