I'm monitoring the pool 3x/day and dosing with bleach I.A.W. with the calculator.

Here are my readings from this AM:

free cl 9
total cl 15
combined cl 6
pH > 15
No CYA reagent

How will I know when the algae is dead ( I can see none in the pool)? I think the answer is when the free cl remains at or about 15 overnight? Then I would need to test for CYA and boost it? Thanks for your help.