[Essential 6 in 1 pool water tester]: Designed specifically for pools and hot tubs, this multi-functional saltwater tester accurately measures pH, salt, ORP, TDS, EC and temperature. Ensure that your water quality parameters are within a safe range, allowing you to fully enjoy your swimming experience. [Easy and User-Friendly]: This pH and salinity tester is a must-have tool for all pool and hot tub owners. Simply immerse the tester's probe into the water and wait for 5 seconds. The clear LCD display will provide you with accurate readings, no more tedious paper strip testing and guessing measurement results by comparing colors for minutes. [Versatile for Different Pool Types]: No matter what type of pool you have, our 6 in 1 pool water tester can meet your testing needs. For saltwater, it detects the salt level and ensures the proper functioning of your salt chlorinator. And it can also accurately test your pool's pH and ORP levels to ensure they are within the ideal range for maintaining water cleanliness. [Perfect Companion for Hydroponics]: This 6 in 1 digital pH meter is also a valuable tool for hydroponic enthusiasts. It allows you to closely monitor your hydroponic system, helping you balance pH levels and adjust EC and ppm levels of your nutrient solution. Ensure that your plants receive optimal nutrition for healthy growth. [High Accuracy and Stability]: Our pool salt tester features a upgrade probe and high-precision algorithm chip, with the resolution of 0.01. Its exceptional stability and accuracy make it a top performer in water quality testing. All instruments undergo rigorous quality checks and are factory calibrated to ensure reliable test results. Digital pH and Salinity Meter for Saltwater Aquarium Pool Salt Tester for Swimming Pool 6 in 1 Upgraded pH Salt ORP EC TDS Temp Testing Kit for Reef Aquarium Hot Tub Hydroponics