Run a Temp: 10 Thermometers for Your Aquarium

An aquarium thermometer makes it easier to ensure optimum living conditions for your fish. Here are 10 aquarium thermometers to consider for your fish tank.

1. Zacro LCD Digital Aquarium Thermometer (pictured above)

The Zacro LCD Digital Aquarium Thermometer is a digital device that comes with an LCD and a submergable probe. A power button allows you to switch it on and off. It can display the temperature in Celsius and Fahrenheit. The thermometer supports a temperature range of -50°C to +70°C with an accuracy of ±1°C. A single LR44 button cell powers the thermometer and is easy to replace. The display unit has a suction cup for attaching the thermometer to the aquarium.

2. Marina Floating Thermometer with Suction Cup

The Marina Floating Thermometer is a floating thermometer that allows you to check the current water temperature in your aquarium. Its reading scale has markings in Celsius and Fahrenheit for added convenience. It ranges from 0°C to 50°C (40° to 120°F). Marina aquarium thermometer is 4.25” tall and floats in a vertical position. It makes it easy for you to read the temperature. A safety zone indicator on it allows you to check if the temperature is acceptable. You can use it in both fresh and saltwater aquariums. 

3. Capetsma Digital Aquarium Thermometer

The Capetsma Digital Aquarium Thermometer has a cordless design with a temperature sensor located on its backside. You attach the thermometer to the outside of an aquarium. Its temperature sensor measures reading through the glass surface without being in direct contact with the water in the tank. It supports temperature readings from 0°C to 70°C (32°F to 158°F). The thermometer has a large touchscreen display that makes it easy to use. It can alert you when the water in the aquarium reaches a minimum or maximum temperature set by you. It runs on a CR2032 battery.

4. LCR Hallcrest A-1005 Liquid Crystal Vertical Aquarium Thermometer

The LCR Hallcrest A-1005 is a unique offering. It is a strip-type thermometer that you can mount vertically on the outside of your aquarium. Its backside has an adhesive strip for sticking it to a fish tank. LCR Hallcrest A-1005  thermometer shows the temperature in Fahrenheit and supports a temperature reading from 66°F to 84°F in steppings of 2°F. A green box on its Liquid Crystal highlights the current temperature accurately (±1°). 

5. JW Pet Company Fusion Smart Temp Standing Thermometer

The JW Pet Company Fusion Smart Temp Thermometer is an analog option. It has anchoring fins at the bottom that hold it steady in the gravel. The weighted base prevents the thermometer from spinning or moving in the water. Its reading scale has markings in Celsius and Fahrenheit along with a green safe zone that indicates optimal temperature for fishes. It has a temperature range of 0°C to 40°C and 30°F to 104°F with an accuracy of ±1.5°F. A non-standing version of the Fusion thermometer is also available that is mounted using a magnet.

6. AikTryee Aquarium Thermometer

This AikTryee consists of a high-precision stainless steel sensor probe and a 1.6” LCD. Its sensor can measure the water temperature with an accuracy of ±1°F. The screen displays the temperature in Fahrenheit and is easy to read. The thermometer supports a temperature range of -58℉ to +230℉. It uses two LR44 button cells for power which may last from six to eight months. The package includes a pair of suction cups and double-sided tape for installing the thermometer and the probe.

7. Lifegard Aquatics Digital Temp Alert

The Lifegard Aquatics Digital Temp Alert has a large display that shows the water temperature and room temperature in Fahrenheit. The device supports a water temperature range of -58°F to +158°F and comes with a probe for measuring water temperature. Its alert feature allows you to set the minimum and maximum temperature thresholds for room temperature and water temperature. The thermometer starts beeping when the room or water temperature reaches the set threshold. The Lifegard Aquatics Digital Temp runs on a AAA battery.

8. Inkbird Digital Aquarium Thermometer

The Inkbird Digital Aquarium Thermometer can measure room temperature and humidity in addition to water temperature. It has a large digital LCD with a built-in backlight. The thermometer can display readings in Celsius and Fahrenheit. Its probe supports a range of -40 to 100°C with an accuracy of ±0.5°F (0.3°C). You can install an application on your smartphone to monitor and export recorded data. It uses a pair of AAA batteries.

9. Windbells Aquarium Thermometer

The Windbells Aquarium Thermometer supports a temperature range from -50°C to +70°C. The large LCD on the thermometer makes it easy to read. It can display the reading in Fahrenheit or Celsius units. There are two suction cups provided for easy installation. It uses a single LR44 battery that will last for several months. Available in yellow and black colors.

10. POPETPOP LCD Digital Aquarium Thermometer

The POPETPOP LCD Digital Aquarium Thermometer is another great option for fish tanks. It supports a temperature range of -20°C to +70°C with an accuracy of ±1°C (±2°F). Its LCD can show the reading in Celsius or Fahrenheit. The thermometer uses a highly-accurate sensor for giving precise readings. It measures the temperature every ten seconds. You can install the device and the probe using suction cups or spring clips. It is powered by two AG13 button cells.