24/7 Real-Time Monitoring & Alerts: Monitor pH, salinity, Temp, TDS and 3 parameters via app. Set custom ranges for each value and receive instant SMS/app alerts when levels go out of range. Never miss critical changes in your aquarium Universal Aquarium Compatibility: Featuring three versatile installation modes - fixed-mount, suction cup attachment, and free-floating design, this probe effortlessly adapts to any fish tank Upgraded Probe: The smaller size, 62% smaller than previous probes, more stable data. And Titanium-coated electrodes with automatic temperature compensation( Rinse under tap water monthly) Lab Accuracy for All Tanks: Precisely measures pH (±0.1), ORP, salinity (±2%F.S), TDS, EC (±5%F.S), specific gravity (1.000-1.222), and temp (±0.1). Certified for freshwater and saltwater aquariums, hydroponics, and ponds Precision PH Calibration System: Includes 2 sealed packets each of pH 4.01, 6.86, and 9.18 calibration powders for triple-point calibration (industry-leading accuracy ±0.1 pH). EC solution excluded due to specialized shipping regulations. EC solutions sold separately Kactoily Smart Aquarium Water Monitor, Salinity pH ORP TDS EC Temp Multi-Parameter Tester for Freshwater Saltwater Fish Tanks Real-Time Alerts Upgraded Version