• Digital Pool Salt Tester for Swimming Pool Large Simultaneous Screen Salinity pH Meter for Koi Pond Aquarium Fish Tank Hot Tub EC Tester for Indoor Garden Hydroponics Water Quality Tester KWD 13.500
• Digital Salinity Tester for Saltwater Pool Salt Tester pH Meter for Swimming Pool Hot Tub Spa Koi Pond Aquarium PPM EC Meter for Hydroponic Nutrient TDS Meter for Drinking Water RO System KWD 10.500
• Solar Floating Salt Tester and Pool Thermometer – Accurate Salinity and Temperature Monitor for Pools, Hot Tubs, and Spas | Durable Solar-Powered Design | Easy-to-Read Floating Water Tester KWD 11
• pH Salt Tester TDS Salinity pH Tester 6 in 1 Digital Salt ORP Tester for Pool Spa Hot Tub TDS EC Temp Tester for Hydroponic Aquarium KWD 13.500