Donldson, last week I tested my pool's CYA and it was registering below 30. That's all I could guess at due to the test kit I had. I bought stabilizer and followed the directions to raise my CYA by 20ppm and yesterday I was reading 100! I added the stabilizer sometime last week, though I'm not sure exactly what day it was.
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Amail, I did go to that article. It said that those levels were NOT recommended. That's why I asked if it was safe to swim in.
Anyway, thanks for your help everyone.