The Marina LCD Digital Aquarium Thermometer features an easy-to-read liquid crystal display (LCD) that is reliably accurate to plus-or-minus 1° F: no guessing, no color confusion. It mounts horizontally and easily sticks to the outside surface of any aquarium.

• Accurate and easy to read aquarium thermometer
• Mounts easily on outside glass
• Reads temperature range from 68 to 86° F
• Aquarium Thermometer Length 0.6"L x 3"W

Just place this removable thermometer in an easy to read position below waterline.