Shock with bleach to 20 ppm, then see if you have any CC. If not, you are done.
Re-check your calcium. Recommended numbers for concrete/plaster pools is 200-400ppm and you only got to 300. As lono as it's in that range you are FINE, but higher is a problem.
Alk is technically a tad high but I wouldn't worry--it's only 130.
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