Performed the FC test and after 4 scoops of the powder it didn't even remotely turn pink. So instead of wasting my reagents I decided to just put another jug of bleach in.

Tested the pH and it is now 7.8 or 8.0

How long should I wait for the pool to circulate before I test for FC again? From the videos I saw it should start turning pink almost instantly... should I put more scoops in when I'm testing?