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Fluval Sea Hydrometer

Fluval Sea Hydrometer provides an accurate and convenient method of measuring specific gravity and salt level in marine aquariums. Compact and easy to use, the hydrometer can be permanently installed ..


Tetra Tec Comfort Aquarium Hydrometer

Marine fish and corals require stable water conditions, which makes regular checking of salinity important. It’s also necessary to check salinity when making up new water for water changes. The TetraT..


TMC AquaHabitats Hydrometer

Combined aquarium Hydrometer & Thermometer.Will give a salinity reading with an accuracy of 0.002.You just need to gently lower this hydrometer into your aquarium water, the hydrometer will need t..