Underwater Treasures Floating Glass Thermometer
Floating Glass Thermometers deliver accurate and easy-to-read temperature measurements for home or commercial aquariums. The unique floating design is equipped with a strong suction cup.
Either secure the thermometer to the side of the tank in a convenient location or allow it to float freely on top of the water for a better picture of tank temperature in a variety of locations. The clear glass thermometer displays temperatures in both Celsius and Fahrenheit for international use. The thermometer is suitable for use in freshwater or saltwater tanks.
Underwater Treasures Floating Glass Thermometers are mercury-free for fish safety. The thermometers measure 4.5 inches in length and include a green band on the temperature line to indicate the correct aquarium water temperature.
| Specification | Detail |
|---|---|
| Material | Clear glass, plastic base |
| Temperature Range | 0°C to 100°C (32°F to 212°F) |
| Display Units | Celsius and Fahrenheit |
| Length | 4.5 inches |
| Water Type | Freshwater and saltwater |
| Safety | Mercury-free |
FAQ
Can this thermometer be used in both freshwater and saltwater tanks?
Yes, the Underwater Treasures Floating Glass Thermometer is suitable for use in both freshwater and saltwater tanks.
Does the thermometer have a floating or fixed installation option?
Yes, it can either float freely on the surface or be secured to the tank side using the strong suction cup.
Is the thermometer safe for fish?
Yes, it is mercury-free and safe for fish in the aquarium.

Caroline Short –
I’ve used this thermometer for over a year in my 55-gallon saltwater tank. It floats steadily and shows accurate readings. The green band makes it easy to spot the ideal temperature range. No issues with calibration or durability.
Molly Skinner –
The floating design works well for checking temperature in different parts of the tank. It’s easy to read and the dual-scale display helps when I’m traveling abroad. A little bit fragile, but overall reliable.
Rachel Graham –
Great for monitoring both freshwater and marine tanks. The suction cup holds well even when the tank is full. I appreciate the clear glass and the green line that indicates safe temperature zones.