1. Unique Suspended Design: The suspended chubby glass design not only makes this thermometer a decorative item in the fish tank but also allows it to freely float in the water, ensuring accurate temperature measurement at different water levels. It adds a touch of charm to your aquarium while fulfilling its temperature - measuring function. 2. Precise Temperature Measurement: Filled with high - quality kerosene, this thermometer offers precise temperature measurement. The expansion and contraction of the kerosene in the glass tube accurately reflect the changes in water or air temperature. Whether you need to measure the water temperature for your fish or the ambient air temperature around the tank, it can do the job well. 3. Multifunctional Usage: Besides being used in fish tanks to monitor water temperature, it can also be used to measure air temperature in the vicinity of the aquarium. This multifunctional feature makes it a versatile tool for maintaining a suitable environment for both your fish and the overall aquarium setup.