1. Aquarium Salt Tester 5in1 Pool Meter: This versatile meter tests for salinity, pH, TDS, EC, and temperature. It's suitable for measuring the salt content in edible salt, seawater, koi fish ponds, marine environments, and aquarium tanks. 2. Salinity Range: The salinity tester operates within a salinity range of 0 to 9999 ppm/10 to 200 ppt or 0.0 to 25%. It features an automatic temperature compensation function (32°F to 140°F), which minimizes measurement errors caused by variations in liquid temperature. 3. pH Level Testing for Pool Spa: The Braxlee pool tester features an advanced pH testing capability with a range of 0.00 to 14.00. It's ideal for checking pH levels in pools and spas, as well as for applications such as RO/DI systems, aquariums, and hydroponics. 4. Instant Readings: Get instant readings on the easytoread LCD display, eliminating the need for colorimetric test strips. Your results will be available immediately.