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ADA NA Thermometer 10mm (J-10WH) ADA NA Thermometer 10mm (J-10WH)
Street Price: $25.81
Our Price: $19.91
(Out of Stock)
(3)
ADA NA Thermometer 12mm (J-12WH) ADA NA Thermometer 12mm (J-12WH)
Street Price: $29.79
Our Price: $22.98
(Out of Stock)
(1)
ADA NA Thermometer 5mm (J-05WH) ADA NA Thermometer 5mm (J-05WH)
Street Price: $18.85
Our Price: $14.95
(Out of Stock)
(1)
ADA NA Thermometer 6mm (J-06WH) ADA NA Thermometer 6mm (J-06WH)
Street Price: $18.85
Our Price: $14.55
(Out of Stock)
(2)
ADA NA Thermometer 8mm (J-08WH) ADA NA Thermometer 8mm (J-08WH)
Street Price: $18.85
Our Price: $15.32
(Out of Stock)
ADA Thermometer - Easy Read ADA Thermometer - Easy Read
Street Price: $4.95
Our Price: $3.00
153 in stock!
(12)
D D The Aquarium Solution Seawater Refractometer D D The Aquarium Solution Seawater Refractometer
Street Price: $89.96
Our Price: $89.96
(Out of Stock)
Digital External LCD Thermometer Digital External LCD Thermometer
Street Price: $17.95
Our Price: $14.95
(Out of Stock)
(3)
Floating Thermometer Sub Hydrometer Floating Floating Thermometer Sub Hydrometer Floating
Street Price: $14.95
Our Price: $9.90
(Out of Stock)
(3)
Marina Aqua-Minder Digital Thermometer Marina Aqua-Minder Digital Thermometer
Street Price: $39.95
Our Price: $35.50
3 in stock!
(3)
Marina Flexible Coil Brush Hose Cleaner Marina Flexible Coil Brush Hose Cleaner
Street Price: $9.90
Our Price: $9.90
6 in stock!
(1)
Pet Worx Glass Thermometer T-07 15cm Long Pet Worx Glass Thermometer T-07 15cm Long
Street Price: $3.95
Our Price: $2.95
(Out of Stock)
(4)
Pet Worx Glass Thermometer T-08 12cm Long Pet Worx Glass Thermometer T-08 12cm Long
Street Price: $3.95
Our Price: $2.49
(Out of Stock)
(6)
Red Sea Seawater Refractometer Red Sea Seawater Refractometer
Street Price: $119.96
Our Price: $108.90
1 in stock!
(2)
Serenity Digital External Thermometer with Internal Sensor Serenity Digital External Thermometer with Internal Sensor
Street Price: $9.90
Our Price: $8.95
73 in stock!
(14)
Serenity Digital In Tank Submersible Thermometer Serenity Digital In Tank Submersible Thermometer
Street Price: $10.95
Our Price: $10.95
(Out of Stock)
(4)
Serenity Digital LCD Refractometer V2 Calibration Model Serenity Digital LCD Refractometer V2 Calibration Model
Street Price: $129.95
Our Price: $129.95
1 in stock!
(3)
Serenity Seawater Refractometer Serenity Seawater Refractometer
Street Price: $79.95
Our Price: $74.95
1 in stock!
Serenity Seawater Refractometer with LED lit Serenity Seawater Refractometer with LED lit
Street Price: $89.96
Our Price: $89.96
(Out of Stock)
Starpet 55mm Mini Thermometer - Easy Read Starpet 55mm Mini Thermometer - Easy Read
Street Price: $3.30
Our Price: $3.00
2 in stock!
(3)
   
 

Aquarium Thermometers & Salinity Refractometers

Having a quality aquarium thermometer is important to anyone keeping fish, as fish require life in an environment that's kept within a specific temperature range. Here you'll find an array of fish tank thermometer options, including submersible thermometer models and those that deliver both internal water and external ambient air temperature. A quality digital aquarium thermometer should be extremely accurate and do a good job of protecting your fish from suffering the ill effects of unhealthy temperature variances.

Other helpful equipment found here on this page include a number of aquarium refractometer (or salinity monitor) units that are essential in keeping track of your aquarium’s dissolved salt level. A saltwater hydrometer is also designed to measure a tank water's specific gravity and salt level, but saltwater refractometers are most accurate. Tools such as thermometers and salinity refractometers/hydrometers are critical in keeping a healthy saltwater tank.