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★【Measuring range】Thermometer sticker can measure degrees celsius.Celsius temperature is in the range of 10 to 40°C. ★【Easy to Use】Aquarium thermometer sticker adhesive by the back, just peel off the tape and attach it to the surface of the aquarium. ★【Features】The correct water temperature is very important to the health of fish. Each color represents a different water temperature. You can see them clearly and quickly from the surface.