Firstly it is glued to the outside of the tank which does not give an accurate temperature reading INSIDE the tank! The change in the numbers is that you can't determine the temperature that should be "INSIDE" the tank! Grab an old-fashioned floating or sinking thermometer instead if you really need one!
π‘οΈ Lifegard Aquatics Digital Temperature Alert
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capetsma Reptile Thermometer: Accurate and Easy-to-Read Digital Hygrometer for Reptile Terrariums - Temperature and Humidity Monitor in Acrylic and Glass Terrariums (1 Pack)
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π‘οΈ Zacro LCD Digital Aquarium Thermometer: Accurate Fish Tank & Terrarium Water Temperature Monitoring
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π‘οΈ Qooltek Digital LCD Thermometer Gauge with Probe for Vehicle Reptile Terrarium Fish Tank Refrigerator - Fahrenheit Aquarium Temperature Sensor
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Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
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𧲠Efficient Magnetic Fish Tank Cleaner: KEDSUM Floating Clean Brush with Handle Design
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