Top Fin® Digital Aquarium Thermometer at PetSmart. JW Pet Magnet Smart Temperature Aquarium Thermometer (116) $2.79 was $3.99 Imagitarium Glass Thermometer (75) $2.87 was $3.99 Imagitarium Digital Aquarium Thermometer (59) $7.19 was $9.99 Imagitarium Small Aquarium Thermometer … It is extremely easy to use it because unlike many other thermometers that use a suction … Simply attach the display unit to the outside of the tank using the suction cups and submerge … Shop all fish heating & lighting accessories online ... Top Fin Top Paw Treatworx Tropican TropiClean True Chews True Leaf TUFFY Urban Cat Van Ness Vegalicious ... Decor… Aqua Culture: Digital Aquarium Thermometer and Fish Net Digital Thermometer Proper water temperature is essential to maintaining the health and well-being of your fish. This digital thermometer is comprised of two basic components: the sensor and the display. This precision aquarium thermometer … This aquarium thermometer will offer a good bang for the buck because it is highly active and lasts for a long time.