1. You can run the chlorine up to shock level and hope for the best.

2. You can use tri-chlor or di-chlor in a chlorinator.

3. You can get a friend to stop by every other day and add a bottle or two of bleach.

I prefer to manage my CYA so that I can use option 2. That is, have the CYA below 40 ppm when I go on vacation so that use of tri-chlor doesn't take it too high while I'm gone. I'm not always that good so I then resort to option 3. College-aged kids of friends and neighbors work well for this if you don't have family nearby to help. They're always looking to pick up a couple of bucks and some of them are responsible enough to follow simple instructions.