Kurt, I will probably have to go with option 1 this time. We have no nearby teenagers or college students - only friendly with the neighbors, not friends. My FIL can come by and check on the pool but he can't come every night to add bleach. The CYA is high, around 90, but doesn't that just mean that the chlorine will stay around too?

The kids were in the pool just now, and the CL is probably around 8-10, according to the scale on my little test kit. It's a darker shade of yellow than 6, but not orange or anything.

Ph is about 7.3
No hardness
Alkalinity 100 ppm

Thanks again for the help. You guys are wonderful. I can post a photo now that we have a digital camera.