Review on 100W/300W/500W/800W Submersible Aquarium Heater with Intelligent Temperature Probe and LED Display External Temperature Controller for Fish Tank 5-158 Gallons by Donna Lewis

Woke up, everything in the tank is dead. Cleaned up immediately, thought ammonia crash or something. I disassembled the tank and did a lot of research. Started refueling again with the SAME heater. During the cycle I noticed that the water is awfully hot. Almost burned my hand. Although the thermostat shows 70 degrees. The thermostat is DEFINITELY inaccurate, causing the heater to run non-stop. I regret buying this crap. Save your fish and coral, DO NOT BUY. learned my lesson But the second thermostat and a better heater.