Review on 🐠 100W VIVOSUN Submersible Aquarium Heater Combo with External Temperature Controller, Intelligent LED Temperature Display and Thermometer, Titanium Fish Tank Heaters by Sarah Foreman

I really liked it while it was working but after a month it is giving out E1 codes even though it was completely submerged. The first time this happened I unplugged it for a while and then plugged it back in and it worked for another day. Nothing will make it work and my tank is down to 71 degrees and falling fast. I lost a Cory cat and the other two are lethargic. I have to go to Walmart after work and hope they have something because I can't wait two more days of heat without losing all my fish. if I haven't already. However, it does get one star for its handy electronic thermometer. So I can see how cold my water is when my fish are dying.