Review on YukiHalu Small Size Submersible Aquarium Heater: Accurate 1℉, Mini Fish Tank Heater 50W 100W with Thermometer & LED Display by Christine Anyaakuu

For some reason I didn't read the reviews. Both heaters I purchased from this seller have failed and both tanks have reached uninhabitable temperatures. However, the temperature readings showed only 71 degrees. What a huge divorce! I can't return them because too much time has passed. a few months? At first they were good, but they almost welded two tanks from it to ruin. My fish turned white so I put my finger in the aquarium. It was warmer in there than my pool in the middle of summer in Texas! Buyer Warning! Don't risk killing your plants and fish.