Test your pool or spa water to check total chlorine, bromine, and pH levels and ensure your water is always balanced and well-maintained with the Taylor Basic Residential OT Pool & Spa Test Kit. The Taylor Basic Residential OT Pool & Spa Test Kit comes with a dosage chart that allows you to determine the exact amount of chemicals you need to add to your pool or spa, so you never have to guess how much you need. The Taylor Basic Residential OT Pool & Spa Test Kit provides immediate accurate results and is simple to use. Just take water samples and add the reagent to them, then view the results on the easy-to-read comparator. The test kit comes in a hard case with color-coded instructions, making it very easy to read the test results.