If chlorine levels hold overnight, the general consensus is that there are no bugs gobbling up the chlorine. The bugs/algae is dead. Therefore, let the chlorine drift downward. When able to retest CL w/o dilution method, I'd certainly run a CC test just to be sure.

I had a HUGE algae problem at start up last year. I did not vacuum to waste in order to save water. However, due to multiple backwashes/rinses, I probably lost just as much as I would have vacuuming to waste.

While I understand the reasoning for wanting to dump chlorine right into the filter, it would probably not be a good idea (think BANG! BOOM!). If the bugs are dead, they're dead everywhere.

Once the pool has cleared, if you're worried about another episode arising, use some polyquat algicide for maintenance to ward off potential problems. All the while, keeping CL levels in proper range.

Good luck!

CaryB