Floating Saltwater Thermometer Hydrometer Salt Marine Salinity Tester Meter for Aquarium

Introduction

Specification: Size: 19.5cm. Package included: 1 x Thermometer.
Green indicators are ideal range of water temperature and specific gravity for most salt water / marine . Test range 0-40 1.000-1.060. If water level above the green indicator means more salt water is required. Placed in any corner of the aquarium, suspended design, automatic temperature/specific gravity test. It is recommended that the proportion of seawater in the seafood pond is between 1.020-1.023, which is within the safety line. If water level below the green indicator means more fresh water is required.