5in1 water quality tester: measures pH, salinity, specific gravity, temperature, and total dissolved solids (TDS) for comprehensive monitoring of aquatic environments. accurate measurements: features an advanced BNC electrode probe for precise pH readings, essential for maintaining conditions in fish ponds and hydroponics. Total dissolved solids insights: evaluate water quality to support thriving plant growth and healthy aquatic ecosystems through reliable TDS readings. Effective salt management: easily check salt levels in your systems to promote health of aquatic life, with data download capability for further analysis. Use scenario 1: monitor a fish pond to maintain stable pH, salinity, and temperature, enabling healthier fish and better water quality records. Use scenario 2: manage a hydroponic nutrient solution by tracking pH, TDS, and temperature to optimize plant growth and nutrient uptake. Use scenario 3: oversee home aquariums or outdoor aquatic ecosystems, keeping key parameters in check and exporting data for trend analysis and recordkeeping.