Fluval Sea Hydrometer

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Fluval Sea HydrometerFluval Sea Hydrometer provides accurate measurements of specific gravity and salinity in marine aquariums. This easy-to-read hydrometer has clear markings and is compact and easy to use and can be installed inside a tank permanently for continuous readings or used as a portable device. Accurately measures specific gravity and salinityEasy-to-readCompact with clear markings Show more