I'm aware of high chlorine affecting pH levels, but I'm wondering if it also affects CYA, TA and CH. We thought we saw black algae in the pool last night and once I realized we didn't have any chlorine (I know, I know) in the pool, I quickly added bleach so the brushing we did wasn't for nothing. Then I continued with my testing, and started questioning the results of my testing when I got basically a reading of no CYA in our pool, which I found odd. Typically we use pucks, which I'm well aware add CYA to the water, and we didn't drain our pool much for the winter, so I'm not sure why it's showing no CYA.
What other readings does high chlorine affect, if anything?
I also suspect that it *might* be possible that we don't actually have black algae, but rather if my CH is low (if the test result is accurate even with higher chlorine levels), that instead maybe calcium is leaching from our plaster (that's possible, right?). I feel like that's more likely than the black algae, but I'm not really sure, but my plan (if my test results are accurate) is to get my CH, TA and CYA back to "normal" and then start the SLAM process.