You can use the pool if you're keeping your chlorine between 8-15 ppm, with your CYA at 100. Test for combined chlorine, and if it's less than 0.5 and the pH is between 7.2-7.8, then it's fine to use the pool.

If your chlorine is still higher than that, I would feel ok with using the pool with chlorine levels even up to 15 (this is because the CYA is so high), but I would wear an old suit in case of fading.

If you test the water and have CC greater than 1, or if you've been running the pool for more than a few days with a chlorine level less than 8, then I wouldn't swim in it.

Janet