Fluval Sea Hydrometer

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Fluval Sea Hydrometer Provides an accurate and convenient method of measuring specific gravity and salt level in marine aquariums. Compact and easy to use Can be permanently instal led inside the tank for continuous readings. Slim, low-profile design camouflages well inside the tank and will not diminish the aesthetics of the aquarium. Can be used as a portable device, allowing you to take samples simply by submerging it in the water. It features large, easy-to-read markings with ideal salinity range clearly marked in green for clarity. Show more