I was just reading WaterMom's sticky on winterizing AG pools. She mentioned that after she double-doses with polyquat 60, she runs the pump bypassing the filter and says that circulating with the filter will filter out the polyquat!? Is that accurate? Does that mean whenever you use algaecide in the summer with the filter running you're throwing away the polyquat so to speak?

I then add a double dose of 60% polyquat algaecide. Don't use another type!! Put the filter on recirculate instead of filter and run it like that for a day. (If you have it set on filter, the polyquat will just filter out.)