If you let it sit, it will always start to tinge pink--ignore it. If you didn't have any pink when you added the 5 drops, then you don't have any CC.

If the water is holding chlorine overnight, it's clear, and you have no CC, then you can let it start drifting back down to normal--but never less than 5 ppm!! Once it gets below 10 ppm, go ahead and recheck your pH. If it's still high, then you can adjust it at that point.

Janet