![Amazon.com: JUWEL Digital Thermometer 3.0 Precise Temperature Monitoring Suitable for Freshwater and Seawater : Pet Supplies Amazon.com: JUWEL Digital Thermometer 3.0 Precise Temperature Monitoring Suitable for Freshwater and Seawater : Pet Supplies](https://m.media-amazon.com/images/I/416yiBBrYIL.jpg)
Amazon.com: JUWEL Digital Thermometer 3.0 Precise Temperature Monitoring Suitable for Freshwater and Seawater : Pet Supplies
![Amazon.com: JUWEL Digital Thermometer 3.0 Precise Temperature Monitoring Suitable for Freshwater and Seawater : Pet Supplies Amazon.com: JUWEL Digital Thermometer 3.0 Precise Temperature Monitoring Suitable for Freshwater and Seawater : Pet Supplies](https://m.media-amazon.com/images/I/41OfQVV0O2L.jpg)
Amazon.com: JUWEL Digital Thermometer 3.0 Precise Temperature Monitoring Suitable for Freshwater and Seawater : Pet Supplies
![Hey guys how do the built in juwel tank thermometers work? I don't understand how I'm supposed to know what the temperature of the tank is... Some times the colors change they Hey guys how do the built in juwel tank thermometers work? I don't understand how I'm supposed to know what the temperature of the tank is... Some times the colors change they](https://i.redd.it/4wjwuw6e8soa1.jpg)