I just checked my numbers (11:00am) after adding the 4 gal of pool shock this morning (9:15am)

Alk 120
Hard the sample turned a dull yellowy color instead of blue
PH 7.8
Cl turned orange
Br turned orange

How often should I be testing and how long after adding chemicals do I test? At what point do I react to the test results?

Thank you for all your help!