Monitor your hermit crab's habitat to ensure he is comfortable with the All Living Things Thermometer Strip. With easy-to-read numbers, it simply adheres to plastic or glass enclosure walls and that's it! A PetSmart exclusive. Features: Easy to read numbers Includes: 1 - Thermometer Strip Color: Silver and black Installation: Clean a small area on the inside or outside of the habitat wall where you would like to measure the temperature. Be sure to choose a location that is easily visible. Peel the protective backing off the adhesive strip and press the thermometer firmly onto the clean, dry surface. The recommended terrarium temperature for a hermit crab is 72-80A,A F (22-26A,A C). Consult a pet care guide to determine the proper temperature range for your specific pet.