Water Hardness Tester Digital +/- 2% Readout Accuracy, Data Lock Function
Conductivity Meter ±2% Readout Accuracy, Data Lock Function, Water Tester
RO system aquarium – ARKA myAQUA 400 – 400 L/day high-performance reverse osmosis unit – removes 99% of salts, bacteria & nitrate – compact smart filter for aquariums & household – LED change alert
RO system aquarium – ARKA myAQUA 190 – 190 L/day reverse osmosis unit – removes 99% of nitrates, salts & bacteria – water filter & softener for freshwater, marine tanks & home – complete set
Reverse Osmosis RO Filter Housing Replacement with 1/4" Female Ports Suitable for Most RO System or Pre-filtration Aquarium Heater Light Thermometers Plants Air Pump Gravel Sand Decorations Fish Tank
Analog TDS Sensor Water Testing Meter, TDS Meter Module for Water Conductivity and Quality Monitoring, Compact Probe with 4 Mounting Holes for DIY Aquarium RO System
