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Supreme Hydrometer for Saltwater Aquariums
|The Danner Supreme Hydrometer is an accurate, easy-to-use tester for determining the salinity and specific gravity of your saltwater aquarium water. Proper salinity is essential to maintaining the health of your aquarium fish - don't leave it up to chance! Measure salinity in saltwater aquariums Includes salinity and specific gravity scales Easy to read and use Durable clear acrylic construction|