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Specific Gravity Hydrometer
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Hikari AccuProbe Hydrometers

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As low as $6.79
Individually calibrated hydrometers with easy-to-read red pointer provide accurate and convenient measurement of specific gravity. Hikari AccuProbe Hydrometers are individually calibrated for accuracy and assigned an individual certified calibration number to ensure the most accurate readings possible. Durable plastic construction ensures reliable extended use. Accurate to +/-0.001 specific ...
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Deep Six Hydrometer

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As low as $6.99
Easy-read swing-arm hydrometer measures specific gravity and salinity Improved calibration ensures more accurate reading of aquarium water Temperature-corrected and accurate to +/-0.001 specific gravity units Precision hydrometer tests both salinity and specific gravity accurately and without getting your hands wet. Distinct top fill design takes water samples six inches below the surface ...
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Instant Ocean Hydrometer

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As low as $7.99
Easy-to-use swing-arm style hydrometer for brackish and marine systems Precise full range salinity and specific gravity readings Large easy-to-read pointer and wide stabilizer base Instant Ocean's durable, clear acrylic, swing-arm hydrometer is easy to use and easy to read. Full-range results in both salinity and specific gravity (0 to 40 ppt salinity and 1.000 to 1.030 specific gravity) with ...
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