An accurate and easy to read glass thermometer. Its weighted base allows it to stay at the bottom of your aquarium. Has a green safety zone indicator to show the best temperature range for most tropical fish. Each thermometer measures approximately 4" tall. Range: 0 to 40 degrees Celsius and 40 to 100 degrees Fahrenheit.
I've always found these units to be just a bit off because of the placement of the number (temperature) scale. Once you know how much its off, you can deal with it and simply watch for changes up or down. I prefer units that you can mount on the glass or else it moves around and you can't read the temp.
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