Rated 4.4 out of 5 by 9
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
Rated 5 out of 5 by TonyTheTigerbarb I purchased a 300W Nat'l Geo heater for my 135 gallon tank on 01/24/2015 at full retail. It was the most expensive Petsmart had, not on sale, but I needed it immediately. I did use the ten dollar off coupon, so not bad.
My previous 300W heater was a malfunctioning competitor brand that could never get the water to the set temp of 82 during the winter, and would turn off without reaching 78 degrees. It finally stopped heating the tank at all, and the temp quickly dropped to 66.
In researching the various brands that sell 300W heaters, most are cheaper than this Nat'l Geo product, but not effective for tanks >100 gallons. This new heater is rated for tanks up to 250 gallons. However keep in mind it is 23" long, the longest available, so you must have a minimum 24" tank, or place the heater horizontal in the water. For me, it fits perfectly in the left corner, one inch from the gravel. I placed it next to the filter inflow so the heated water circulates well throughout the tank.
It came out of the box preset to 79 degrees, and I have not tried to change it so I don't know if the dial is hard to turn, as some other reviews mention. But it got my 135 gallons of water from 66 to 79 degrees in two days. The fish are much more happy and active now, and even the fire eel comes out from his rock to eat. I'm very satisfied with this heater and give it five stars.
January 29, 2015