Cloudy Water Upon Opening

[Texas Splash]

Is something that could cause permanent damage?

Let's hope not. At some point you seemed to have some CYA, so perhaps there is still some in there, just not enough for a good test. But add about 20-30 ppm as soon as you can. Use the sock method. Retest in a day or so. If your CYA jumps to 40, then increase the FC to 16.