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Aquarium Hydrometers & Refractometers

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Hydrometers & Refractometers
Related Products:
Aquarium Salt
Aquarium Hydrometer/Thermometers
Hydrometers and thermometers combined in one unit from Red Sea and More.
Aquarium Hydrometers
Aquarium hydrometers from Aquarium Systems (Instant Ocean), Coralife (Deep Six), More and Red Sea.
Aquarium Refractometers
For the most accurate salinity readings use a refractometer. They are more expensive than a hydrometer, but they are more accurate and they will last much longer.