I add some bleach every evening, about sun set. You save a little money if you add it at night, since it has all night to work before the sun hits it the next day and starts reducing it.

I have CYA at 50, and have also thought about draining and replacing some water so I can start using the tablets again. Water is cheap where I live, plus I could just fill it with rain water over the winter when evaporation is low. I am thinking about running the roof downspout into the pool to do this.