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Aquarium Systems Instant Ocean Hydrometer
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The Instant Ocean Hydrometer delivers precise full-range salinity and specific gravity readings--accurate to 0.001. Easy to read display and simple to operate.
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Coralife Deep Six Hydrometer
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From Coralife. Range is 1.000 to 1.032.
Every unit is calibrated and tested for accuracy using advanced testing procedures.
With its durable construction and easy-to-read scales, the Deep Six is guaranteed to provide years of reliable performance. Designed to give temperature-corrected readings in warm water aquariums, readings can be read in ppt and specific gravity. The Deep Six is accurate to +/- 0.001 specific gravity.
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More Hydrometer/Thermometer
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The glass "drop-in" style aquarium More Hydrometer/Thermometer is approximately 8 inches long
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