I purchased a Taylor DPD Deluxe from the local pool store. I was told it had all I needed, including CYA, but it didn't.
It tests for FC from .5 to 5 ppm, pH from 6.8 to 8.2 plus TA, CC and Acid Demand.
I went directly to Taylor's website and purchased a K-1721 Test Kit for CYA using the...