Review on Soyon Submersible Aquarium Heater - Adjustable Temperature 100W, 200W, 300W, 500W - Ideal for Fish Tanks 10 Gallon to 100 Gallon - Efficient Water Heater by Bob Schultz

Looks like a quality heater but after reading some of the reviews I'm reluctant. I will test it in a test tank first to make sure there are no issues like overheating, overheating or melting. At the moment my main concern is that the brand received does not match the brand advertised and the instructions were confusing and took a little time to understand. [UPDATE] Tested and working fine, no issues. Keeps up the pace very well and ups the stars to 4 as the instructions are vague for a beginner. [UPDATE 2] Heating failed after purchase in February, now June. crash at work. Boy I just lost about $100 on shrimp. I will not buy again.