I've been talking to Chem_Geek about the chlorine / polyquat relationship. You have to realize that some of what's happening is not known, except maybe in Buckman Lab files that haven't been released. But here we go:

1. Polyquat is partially destroyed by chlorine, possibly with a 1 week half-life.

2. The chlorine consumption by polyquat is roughly 1 ppm per ppm. So if you add 6 ppm of polyquat, add 6 ppm of chlorine 24 - 36 hours later to make it up.

3. Polyquat is ALSO removed by filtration. If bypassing your filter will not cause other problems, then the polyquat will last longer if you put your filter on bypass (often "Recirculate" on multiport valves) or remove your cartridge from the filter.

4. Keep in mind that only pool covering, SWCG use, raising borates and lowering phosphates are a completely durable vacation tactic. Every other approach -- HiC2, feeders & floaters, polyquat, even copper -- depends on chemicals that will tend to disappear from the water (or feeder) in the course of normal operation.