The Aqueon Mini Heater is ideal for small aquariums, up to 5 gallons in size. Fully submersible and shatter proof design keeps your fish safe. Thermal safety fuse shuts off the heater when it dries out or in any other event it might overheat. When used on aquariums between 2 and 5 gallons, it keeps the water temperature at the ideal range for tropical fish, 5 to 10 degrees Fahrenheit above ambient air temperature. Never raises the temperature above 80 degrees Fahrenheit.
I have a 2.5g tank and I have to constantly un plug the heater because it runs 90.
I had 2 small betta tanks that needed heaters. Ended up purchasing 2 of these guys. No problems at all. Going on 3 months now. Stable 78*.
running at 82 on a 3 gal 11/17/2013
Going to look for a new brand tomorrow. My shrimp I intend on buying in a few weeks will probably get steamed eventually. Definitely not below 80 degrees like in the product description.
Too HOT!!!! 10/12/2013
It does go above 80 degrees. Tried it on my 8g and 2.5g. Thermometer was reading just about 90 degrees.
I have 2 4/25/2013
I originally bought one for a 3-gallon half moon tank, but when we bought a 5.5 I got another one.
The temperature in both aquariums has remained a constant 76 degrees and if I buy another small aquarium I will buy another one.
not good 11/30/2012
it was working well in the beginning but then the temp kept on dropping
WILL FRY YOUR FISH 11/4/2012
I put this in my betta's 2.5 gallon for the winter. OVERNIGHT it cooked it to almost 90 degrees! I immediatly unplugged it and watched my water go back down to 80. Thanks to this terrible product, I now have to search for ich on an already white betta.....what fun. No. It's really awful. Please don't buy this.
Temp went wack 8/26/2012
Well maybe its cuz I was using for a 1 gallon although its rated for up to 5 gallon, but my temperature went to 100 degrees! My fish's gills were moving rapidly and when I saw the temp, my goodness. I'm giving it another try in a bigger tank but if it pulls a another one like this, it'll be in the trash.
Keep an eye on the temp! 7/13/2012
Reviewer: Cichlid lover
I purchased this product for my 5 gallon tank. It says it is not supposed to raise the temp above 80 degrees F. I was adding some more decor to the tank and by luck I did it just in time. The water was extremely warm. Checked the temp and it was almost 90! Had to unplug and cool the water down. No fish died. Won't trust this heater again.
TERRIBLE PRODUCT,DONT BUY 5/1/2012
I thought it was a perfect choice for a 3 gallon q.t. tank, then it randomly shut off only after a week of use killing a $100 fish. DO NOT BUY!!!!!!!!!!!!