It will test salt in 200ppm increments. cya is probably 20 to 100 or 30 to 100 ppm if Ben is using the Taylor testing tubes. the fas dpd can test very high levels of chlorine. I believe it is up to 50 ppm with accuracy to .5 ppm (could be wrong on this. pH is I believe 6.8 to 8.0 (once again based on Taylor info) and the titraton tests for alkalinity and calcium are in increments of 10 ppm and theoretically have no limit same as salt. (the limit is the size of the testing vial and the amount of titrant you have on hand!)
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