Heidi found it spicy. 3. Its black background and white lettering help make it easy to read, and it provides the current temperature in both Fahrenheit and Celsius. How To Read A Fish Tank Thermometer? Finally Understand! Thermometer Strips Accurate Or Reccomendation? - FishLore Top 10 Betta Heaters of 2022 - Ten Product Reviews I got a tank for my new betta fish, and wanted to try out one of those strip thermometers that are designed for the outside of the tank, but i accidentally put it inside! For anyone looking for a quirky and interesting pet, the freshwater crayfish is an excellent choice.. While it was in there I noticed my betta picking at the sides of it so im concerned that he was eating it? D. Dazzer87 Fish Fanatic. Imagitarium Aquarium Strip Thermometer - Petco