Pool owners and aquarium enthusiasts, this PUREFIZ digital water tester is your all-in-one solution for perfect water quality! It measures five crucial parameters: salinity, pH, temperature, EC (electrical conductivity), and TDS (total dissolved solids) - no need for multiple separate testers. The salinity testing offers three display modes (PPM, PPT, and %) making it versatile for pools (0-9999ppm), marine water (10-200ppt), and even food salt content. The large backlit LCD screen is easy to read indoors or out, and simple button controls make operation straightforward. The high-precision titanium alloy probe provides quick, accurate readings you can trust for maintaining your pool, hot tub, aquarium, or hydroponic system. It comes with three pH calibration powders (4.00, 6.86, and 9.18) for easy calibration to ensure ongoing accuracy. Powered by 3x LR44 batteries, it's portable enough to take anywhere for on-the-spot testing. Perfect for saltwater pools, freshwater aquariums, koi ponds, spas, drinking water testing, and gardening applications. The compact design stores easily in your pool maintenance kit or aquarium supply cabinet. If you're serious about water quality but tired of complicated test strips or multiple testing devices, this 5-in-1 meter simplifies everything while providing professional-grade accuracy. It's that one tool that does it all, saving you time, money, and frustration while keeping your water perfectly balanced!