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Abnaok Salinity Tester, Sea Specific Gravity Test for Fish Tank...

$11.99
Safe Material:Made of plastic,aquarium clear Automatic Accurate Readable SaltWater Hydrometer. Durable Clear Acrylic:Accurate, durable, and easy to read your marine aquarium's salt level and specific gravity,Small and waterproof.if the specific gravity between 1.000 - 1.019,show that the specific gravity is small;if the specific gravity between 1.020 - 1.023,show that the specific gravity is nomal;if the specific gravity between 1.024 - 1.030,show that the specific gravity is big; Clearly Safe Zone Indicated:Includes solinity and specific grovity scales.The outside rang of scale indicates salinity(PPT).The inside range of scale indicates gravity.And with safe zone clearly indicated.Range of use: 0-40 degrees (1.000-1.030).If the salinity ppt between 32 - 40,show that the salinity hydrometer is high;If the salinity ppt between 27 - 31,show that the salinity hydrometer is normal; If the salinity ppt between 0 - 26,show that the salinity hydrometer is light.

Aquarium Salinity Refractometer with ATC Function,Saltwater Test Kit for Seawater,...

$17.99
Make sure this fits by entering your model number. DESIGNED FOR - testing the concentration of saltwater, help you to monitor and control the concentration of salt water. WIDELY USE - Can be used for Aquariums, Marine Monitoring, Agricultural, Gardening & Educational Purposes.

boxtech Aquarium Marine Test, Sea Saltwater Hydrometer, Reef Ocean Hydrometer...

$9.99
🐠 Safe Material & Unique Design: Made of durable Acrylic, this Fish Tank Test Kit salinity Hydrometer is designed with an automatic level function 🐠 Quickly, easily, and accurately measurement: With this hydrometer saltwater aquarium test kit, you can test your marine aquarium's salt level and specific gravity, and It is optimum to be put into below 6" deep water to avoid the error caused by the oil film on the water 🐠 Higher Accuracy & safe zone indicated: Readings are temperature-corrected & accurate to +/- 0. 001. specific gravity units ranges from 1. 000 - 1. 030 with a safe zone of 1.020-1.023. The outside range of scale indicates salinity ppt, ranges from 0-40, safe zone is 27-31

capetsma Salinity Tester, Accurate Sea Hydrometer Aquarium Marine Salinity Meter...

$9.99
🐠 Safe Material & Unique Design: Made of durable Acrylic, this Fish Tank Test Kit salinity Hydrometer is designed with an automatic level function. 🐠 Quickly, easily, and accurately measurement: With this hydrometer saltwater aquarium test kit, you can test your marine aquarium's salt level and specific gravity, and It is optimum to be put into below 6" deep water to avoid the error caused by the oil film on the water. 🐠 Higher Accuracy & safe zone indicated: Readings are temperature-corrected & accurate to +/- 0. 001. specific gravity units ranges from 1. 000 - 1. 030 with a safe zone of 1.020-1.023. The outside range of scale indicates salinity ppt, ranges from 0-40, safe zone is 27-31.

Coralife Energy Savers ACLAF877 Deep Six Hydrometer

$8.27
Included components: All Components included in Picture and Description Cora life is one of the markets leading manufacturers of premium aquarium products Cora life's Hydrometer takes a true water sample at six inch depth

Digital Salinity Tester for Salt Water – Aquarium Salinity Meter...

$33.99
Make sure this fits by entering your model number. [Large Salinity Range] Ciztada salinity tester has 2 measurement modes, scale range: 0~9999 ppm/10.0~200 ppt and 0.00-25.00%, which is 2 times than the salinity refractometer [Automatic Temperature Compensation] Notice: We recommend waiting for a while to observe the measurement results for more accurate reading. Ciztada salinity tester is equipped with ATC part inside, during normal temperature, once calibrated, the temperature change would never affect the accurate of your measuring result.

DXOPHIEX Salinity Tester Hydrometer Specific Gravity Tester for Saltwater Fish...

$12.99
The seawater hydrometer is used to test the salt concentration in the seawater. The compact design makes the mechanical hydrometer easy to carry and use, efficient, accurate and reliable. Easy-to-view reading scale, for most Marine life, the applicable reading is between 1.021 and 1.023. Innovative design with filtering sponge at the inlet to efficiently eliminate the dirt in the marine water.

Fluval Sea Hydrometer for Aquarium, Medium

$8.95
Make sure this fits by entering your model number. Helps measure specific gravity and salt level in marine aquariums Features large, easy to read markings

Glass Hydrometer Saltwater Temperature Thermometer Aquarium Fish Tank Marine

$8.98
Make sure this fits by entering your model number. Aquarium and exo terra reptile tank thermometer. Size: 19.5cm.

Hikari AccuProbe Aquarium Hydrometer, Full

$13.87
"Dry Hands" design avoids contamination of aquarium or water sample Accurate to 0.001 specific gravity and salinity (PPT) measurements Auto-temperature correcting design

Instant Ocean SeaTest Hydrometer

$12.16
Make sure this fits by entering your model number. Marine hydrometer: Tests salinity and specific gravity in marine aquariums to help maintain a healthy tank Accurate: Precise, full-range readings - accurate to +/- 0