Rated 4.4 out of 5 by 33
Rated 5 out of 5 by DaveIA Good experience - you need to know how to do it
My experience running 2 of the 50-watt heaters has been very good. One heats a 5-gallon tank and the other heats a 10-gallon one. I make sure to acclimate the heater thermostats FIRST by submerging them into the tank water for at least 30 min. before turning them on. Once they've been running, I left them cool at least an hour before removing them from the water. They warm up the water gradually; takes about 4 hr. to warm a 10-gallon tank from 60-F to 80-F. I can't speak for the negative reviews - might be user error, might be that rare manufacturing defect. I recommend these highly. They've been holding accurate temperatures consistently for over a year now.
November 20, 2015
Rated 5 out of 5 by MoonlightSiren Works great, no problems
I have had the 100w for over a year now and have had no problems at all. I used it in my 30 gallon tank at first but then had to downgrade to a 10 gallon tank. I have it set to 76 degrees but it actually keeps the water at 78. I would definitely buy this heater again.
August 10, 2015
Rated 1 out of 5 by Brizzle DO NOT BUY THIS
Worst heater! NOT worth the money at all! Had it for a few months and then I heard a "knocking sound" in my tank, turns out water was leaking INTO the heater. SO I googled it, turns out its an EXTREMELY common problem with this aqueon piece of garbage.
April 29, 2015
Rated 5 out of 5 by ZoZore109 Wonderful for 10 Gallon Tank!
I put this in my betta's 10 gallon tank and it quickly went to work. In 10 minutes the tank was perfectly warm for my fish. The dial is easy to use and the glass doesn't burn my fish. Merlin loves resting near his heater.
April 11, 2015