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 You have to insert the

You have to insert the glass drop checker inside the tank with the pH solution and wait for the readings

It also provides trace elements: sulfur for proteins

clear reading

and pH (pH)

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 You have to insert theBrand: 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,