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Aquarium Hydrometers
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Coralife Deep Six Hydrometer Coralife Deep Six Hydrometer

Product Code: RES00877
The Coralife Deep Six Hydrometer range is 1.000 to 1.032. The Deep Six is accurate to +/- 0.001 specific gravity.

Our Price: $8.50
In Stock
Aquarium Systems Instant Ocean Hydrometer (TK-504) Instant Ocean Hydrometer (TK-504)

Product Code: RAS02503
The Instant Ocean Hydrometer (TK-504) delivers precise full-range salinity and specific gravity readings--accurate to 0.001. Easy to read display and simple to operate.

Our Price: $8.69
In Stock
More Hydrometer More Hydrometer/Thermometer

Product Code: RTI00297
The glass "drop-in" style aquarium More Hydrometer/Thermometer is approximately 8 inches long

Our Price: $4.69
(Out of Stock)
Two Little Fishies AccuraSea 250 ml Two Little Fishies AccuraSea, 250 ml

Product Code: RTL50700
With Two Little Fishies AccuraSea you can measure your salinity precisely. AccuraSea seawater reference solution is the only calibration solution of its kind made from real seawater. Its pure natural sea water micron filtered and UV sterilized then adjusted with reverse osmosis water to the standard S = 35 or conductivity of 53 mS/cm at 25C (77F). Use it to accurately calibrate seawater refractometers and check the accuracy of swing-arm hydrometers.

Our Price: $7.99
(Out of Stock)