Digital Salinity Tester for Salt Water - Waterproof IP67 Salinity Meter with ATC Large Range 0-200ppt Saltwater Tester for Seawater, Aquariums, Marine Monitoring, and Koi Fish Pond by ORAPXI Fluval It also provides trace elements:

It also provides trace elements: sulfur for proteins

4 x Button battery

⬛Test for 8 Water Parameters -- hygger 8-IN-1 test strips test for pH level

7-in-1 Aquarium Test Kit: Total hardness (GH)

Quickly get test results in seconds

Digital Salinity Tester for Salt Water - Waterproof IP67 Salinity Meter with ATC Large Range 0-200ppt Saltwater Tester for Seawater, Aquariums, Marine Monitoring, and Koi Fish Pond by ORAPXI Fluval It also provides trace elements:Brand: ORAPXI Color: Black Features: Salinity Range: 0~9999ppm 10~200ppt or 0. 0 25%, ORAPXI salinity tester has an automatic temperature compensation function(32F~140F), which can decrease the error caused by the change of liquid temperature. Wide applications: There are various purposes for the salinity tester. This instrument can not only detect the salt content of edible salt, salt water pool and koi fish pond, but also the salinity of seawater,