Review on VIVOSUN Submersible Intelligent Temperature Over Temperature Fish & Aquatic Pets by Obhed Leblanc

Pros: Great heater for the price, heats tank quickly and maintains set temperature, easy to set up; Just plug it in, set the temperature and you're done (note: it's designed for the water to drop 2 degrees below the set point before it turns on). Digital display is a plus. Cons: Passed two in a year and a half. The first worked great for a year. Then he began to work constantly, making our aquarium cool to almost room temperature. We thought it was an accident so we took another one. The second worked great for about 5 months. Then, when it was fully submerged, it issued an E1 error code about the lack of water in a full tank. Fixed by tapping the heater. The error returned two months later and was corrected again. and now I can't keep the temperature like the first time. It could be a great heater with a little finesse. Let's get back to Marineland heaters.