Hydrometers & Thermometers

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Coralife Energy Savers ACLAF877 Deep Six Hydrometer

$13.23
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LCR Hallcrest A-1005 Liquid Crystal Vertical Aquarium Thermometer

$11.06
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Qooltek Mini Hygrometer Thermometer LCD Display Digital Temperature Humidity Meter Gauge for Incubators Reptile and Humidors (Fahrenheit)

$19.17
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Salinity Refractometer for Aquariums, Marine Monitoring, Fish Tanks, Saltwater Testing, Dual Scale Salinity Meter Specific Gravity 0-100ppt & 1.000-1.070, Professional ATC Salinity Water Tester Kit

$26.93
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Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT with Automatic Temperature Compensation

$31.81
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Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature

$11.18
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Zoo Med Digital Thermometer

$12.70