I've only used these thermometers in my betta tank for a few days so can't comment on their durability, but so far they seem to be decent, accurate thermometers . I have two of these installed in the same tank and both have the same temp reading, +/- fractions of a degree. They also matched the temperature shown on my more traditional mercury thermometer, which I placed in the tank for comparison. I will buy more for my other tanks.
π 6 Pack AQUANEAT Aquarium Thermometer - Reptile & Fish Tank Digital Thermometer with LCD Display for Terrarium Water Temperature Test
9 Review
capetsma Reptile Thermometer: Accurate and Easy-to-Read Digital Hygrometer for Reptile Terrariums - Temperature and Humidity Monitor in Acrylic and Glass Terrariums (1 Pack)
8 Review
π‘οΈ Accurate Water Temperature Monitoring with DIGITEN Digital Aquarium Thermometer for Reptiles, Turtles, and Amphibians
8 Review
π‘οΈ Lifegard Aquatics Digital Temperature Alert
9 Review
π Enhance Aquarium Maintenance with hygger Carbon Fiber 6 in 1 Cleaning Tool Kit β Algae Scraper, Scrubber Pad, Sponge, and Telescopic Handle for Optimal Fish Tank Cleaning in Saltwater and Freshwater Environments
5 Review
Penn Plax QN2 Quick Fish
9 Review
Aqueon Siphon Vacuum Gravel Cleaner Mini: Compact 5-Inch Cleaning Solution
9 Review
π Enomol Gravel Vacuum - Aquarium Water Changer and Fish Tank Cleaning Tool Kit, Universal Siphon Pump for Quick Aquarium Water Changing
5 Review