Salinity Tester, Plastic Hydrometer for Aquariums with Automatic Water 1.020-1.023 Specific Gravity Range for Fish S (68-86F)

Suitable for warm water (20-30 celsius ). A change in temperature will cause a change in the reading. Unit specific gravity is accurate to +Celsius-0.001. Insert the hydrometer at least 15 cm into the (if the insertion line is less than 15 cm, the grease on the will affect the accuracy of the test). When the water reaches the state of full water (upper part with plate), lift the hydrometer, the product can be manually or hung on the cylinder, with automatic water function, can automatically find the water , to avoid errors. Item type: Seawater Salinity Meter Condition: 100% brand new Material: plastic Color: As picture shown