Look at the Best Guess chart. Your chlorine is high for CYA=55; running higher levels than recommended will, in sunny weather, lead to excess chlorine loss.
But . . . there's no way you know that your CYA=55ppm. There are NO test kits available outside university or major water analysis labs that would allow you to get those results ACCURATELY. I'm guessing you have test strips and some sort of reader?
Using an electronic reader with 'guess-strips' is a case of trying to make a "silk purse out of a sow's ear". Guess-strips are ESPECIALLY bad at CYA readings, and often can't tell the difference between 20 ppm and 50 ppm CYA. These readers 'make up' extra numbers so you think you are getting a really accurate reading, even though you are not. Sometimes, however, they can be consistent in the bad reading they deliver, as long as you use the same type of strips and reader each time. But consistency does NOT equal accuracy, either.
What this means is you may have CYA much lower than 55. If you want test results that are as accurate as possible (+- 10 ppm CYA on the low end of the scale), order a K2006 or K2006C. Amazon links in my signature.
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