Rated 4.5 out of 5 by 10
Rated 5 out of 5 by Melian Excellent
I purchased this heater a few months ago and I've had no issues with it. I only put my thermometer in the tank for a week and it was perfect. I didn't pay attention to what it was actually set at. After reading reviews about the hard to turn dial and how the temperature is often off, the dial is hard to turn but it doesn't bother me. You can calibrate this heater as you wish if the temperature setting and actual output bothers you. There are instructions online on how to do this properly and safely.
February 26, 2016
Rated 2 out of 5 by brothergc123 works BUT
Bought a 150w for my 29 gallon , the heater does work BUT temp accuracy is way off I am talking 8 degrees . verified this with 2 thermometers . At 1st I thought it was my digital thermomitor but I bought another mercury style and it agrees with the other . Have it set to 74 deg F on the heater which equals 79 Deg F real temp . Disapointed especialy at this price point . Could have had a ehim Jager for the same price and better quality
January 14, 2016
Rated 5 out of 5 by Fishwich It works
It works and well. It was set higher than my floating thermometer liked but, it was easy to adjust. A good heater.
December 20, 2015
Rated 5 out of 5 by EthanShaw Works efficiently
I was worried that the National Geographic name was just being put on a bad heater, but in all it has been working fantastically in my 60 gallon heater
March 2, 2015