Review on 🦀 Zoo Med 4-Watt Hermit Crab Heater: Efficient Heating for Optimal Habitat, 7.3 x 4.2 x 1.8 inches, Lightweight and Compact at 5.6 ounces by Carolina

Was only a few weeks, did not like it very much. I have 10 gallons. Glass basin and 3 hermit crabs. Put on the tank as indicated on the packaging. I got some advice from my local small town pet store. He suggested putting it under the tank on one side. Spray the substrate from time to time and cover half of the screen cap with a piece of cardboard for the winter. Humidity rose to the ideal 70-74. Hermits are much happier.! This now works fine for my 10 gallons. Tank.