Betta Glass Thermometer

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The Betta Easy Read Glass Thermometer is a straightforward and reliable tool that sticks to the inside of your aquarium, making temperature checks a breeze. Perfect for tropical fi sh tanks with delicate inhabitants, this thermometer features a sturdy suction cup that lets you pop it on the tank wall or hop between aquariums with ease. When using it in a mixed-species tank, focus on the most temperature-sensitive fish. Most tropical fish thrive between 21-27°C, marked by the handy green zone. For the best reading, check the number at the water’s lowest curve—the meniscus! Show more