This inventive idea for the SmartTemp Thermometer combines a thermometer with a magnet. The Thermometer is placed on the inside of the tank while the magnet is placed on the outside to hold the SmartTemp firmly in place.
No suction cups are needed. The SmartTemp also offers a Green Safe Zone which indicates the optimal temperature range.
It offers extreme accuracy (+/- 1.5 °F) and the SmartTemp has large easy to read numbers.