This thermometer works great with my 9 gallon Biora tank. The suction cups work beautifully, I had no problem dropping them sideways and the temperature was set right and exactly how I want it. The cord is nice and long too, which is good so you don't have to worry about extra extension cords. It's also a nice little compact size so it won't take up too much space in a 9 gallon aquarium.
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