Closing chemistry recommendation

[CarlD]

I wonder about the effectiveness of Polyquat additions in high FC pool water. Typical a high FC will cause the polyquat polymer to become cleaved into shorter fragments. It's not clear that the effectiveness of the polyquat is degraded but the recommendation is to add the polyquat after the FC comes down to "normal" levels.

I'm not arguing with your methodology, just wondering if there's a better point at which to add the polyquat?

That is not MY recommendation.
I bring FC up to shock level, and when it holds there, add a quart of Polyquat.
I wait 48 hours, during which time FC plummets due to the Polyquat.
I then raise FC back up to shock level and close.
I always open to a clear pool unless I wait too long after the ice melts in the spring.