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ZRM&E Seawater Hydrometer for Aquarium Aquaculture Seawater Densimeter Ocean Hydrometer Salinity Meter for Fish Tank Salinity Specific Gravity Test
Made of high quality plastic, aquarium transparent, automatic accurate reading brine hydrometer
Accurate, durable and easy to read salt and specific gravity of your marine aquarium, small and waterproof.
The external range of the scale indicates salinity (PPT), and the internal range of the scale indicates gravity. And clearly mark the safe area. Application range: 0-40 degrees (1.000-1.030).$0.00