Review on LUOOV Submersible Controller Freshwater Thermometer by Donald Blasko

It has arrived and I was really looking forward to it. I had the best heater for my Betta tank (10 gallon Fluval Flex) that died and was replaced under warranty and THAT died too so it was time to find something else. In the meantime I had a regular small heater, just a pre-installed one with no controls whatsoever. In winter, it is more difficult for them to maintain the ambient temperature. This was something I found at the right time - here in Wisconsin it started to drop below freezing in early November so I tried replacing it with a water change today. Connected well, fits in my aquarium but it's DOA. It shows 77 regardless of the temperature of the water I put it in and an error message below. Holding down the button to change the settings does nothing, the button doesn't respond at all. You can disconnect and reconnect the heater from the control module so I disconnected and reconnected it to check both pins to make sure nothing was bent at the factory and just reinstall everything. error status. So it went in the trash and I'll keep looking for a model from a reputable manufacturer.