Another option is to run a high cya pool. You do not have to drain. Just make sure you have Ben's kit and keep the cl at the appropriate level. It should not be an issue. In fact, it may be easier as the cl will be used up at a slower rate because of the high CYA. Check your cya every two weeks and adjust accordingly.

If you are chlorinating with liquid bleach, you cya will go down. If you are using stablized tablets, it will increase. Just because you cya is high doesn't mean drastic measures. Let it go down naturally and you don't have to waste water.

Back on the old forum, this was discussed and sometimes advocated as a way to operate your pool. To do this you will need Ben's kit. I hope this helps.