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Fluval Edge 25W Compact Heater

by Fluval
3.9 out of 5 stars 87 customer reviews
| 11 answered questions
List Price: $37.99
Price: $19.42 & FREE Shipping on orders over $49. Details
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  • Provides even and efficient heat distribution
  • Ideal for use with the Fluval Edge Aquarium
  • Maintains set temperature of 78 degrees Farenheit
  • Polymer exterior prevents breakage
8 new from $19.37 1 used from $16.47
$19.42 & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Fluval Edge 25W Compact Heater
  • +
  • Fluval EDGE Gravel Cleaner, 15-inch Intake Tube
  • +
  • Fluval EDGE Carbon Clean & Clear Renewal Sachets - 3-Pack
Total price: $34.57
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Product Details

  • Product Dimensions: 2 x 1 x 11 inches ; 9.6 ounces
  • Shipping Weight: 11.2 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B002Y2LEG6
  • Item model number: A756
  • Average Customer Review: 3.9 out of 5 stars  See all reviews (87 customer reviews)
  • Amazon Best Sellers Rank: #15,384 in Pet Supplies (See Top 100 in Pet Supplies)
    • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Customer Reviews

Top Customer Reviews

3.0 out of 5 starsWorked well for two months, then quit.
By K. Wright on September 12, 2011
I bought this heater for my 5 gallon planted shrimp tank. It fits perfectly into the tank, hides well in a corner (it is black, straight and designed to fit into a corner) and hands-free. No adjustments necessary and keeps my tank temperature well within acceptable range. Has a dim red light that is only visible when tank light is off. I like it that it is completely submersible and unobtrusive. Many of my friends have been impressed with its sleek style and the fact that it really doesn't look like a heater. If I felt like hiding it even more I could put it near the bottom of the tank, but I choose to leave it upright. My shrimp like to hang out on the top of it near the water's surface.

For the price, you won't find a better submersible heater for a small tank. Many would like to be able to adjust the temperature on the heater, but I have never had a problem with it. The suction cups will change color, graying over time, but they stick well and I haven't had any trouble with it as I have with other heaters.

This gets 4 stars because there is no thermostat; otherwise this is a 5-star heater.

BUY THIS ON AMAZON!!! Aquarium stores have to mark it up considerably.

***UPDATE December 2011*** The heater stopped heating my tiny tank. As this was a serious problem for my warm-loving shrimp, I went to Petco and bought a heater with an adjustable thermostat and I hate to say it, but I like the cheap adjustable one better. I won't be buying another one of these heaters. I reduced the rating to reflect the fact that my heater did not last more than eight weeks.
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5.0 out of 5 starsIt does work!!
By jazZy on November 25, 2013
Ok, so for those who posted that they plugged it in and no light turns on, well that's because your water is most likely in the range of 76 -78 degrees. The way this heater works is if it drops below 76 the heater will turn on (with light) until it reaches to the high 70. Also for those who say the water is cold and is most likely not working? Well that's because our bodies run at an ave 98 degrees so when we touch the water that Is in the 78 range it will naturally feel cold. USE A THERMOSTAT it is more correct than your finger. If your water is really warm to the touch then your most likely cooking your tropical fresh water fish. If your thermostat is not in the 76-78 range and is over 82 or under 72 then most likely the heater can be defective. I have owned this heater for some time and have not had a problem, my fish are happy in my fluval edge. This heater is slick and you can hardly see it. I hope this review helps those who are considering this heater for the 6 gal fluval edge or any other tank that is small and don't want a bulky ugly thing in the back of a nicely aquascaped tank. By the way I was hesitant to buy this after so many mixed reviews at first so I bought it at my local pet store just in case I had to return it. Like another post I thought my heater was too defective since the light was only on for some mins and then turned off. I spoke with the company and they told me its not on 24/7 and light will turn on when it drops and light will flash if it is over 82 degrees.
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5.0 out of 5 starsHeater works great!
By Cyrus on January 25, 2011
Verified Purchase
The heater is designed to only adjust the aquarium temp no more than 7 degrees higher than the ambient air temp. This is stated plainly in the instructions. Works perfect on my 6 gallon Fluval tank. It is keeping the tank temp at 76 steady. We keep the thermostat in our house at 70. Very nice looking heater, blends in with the tank background perfectly.
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2.0 out of 5 starsNot sufficient for the edge
By dkoy on April 24, 2012
Purchased for a 6 gallon fluval edge and have had for approximately 3 months. Liked the small size, look, and the fact that it was completely submersible.

It has been unable to maintain a temp over 74 with an air temp between 68 and 70. I added a digital air/water thermometer from my saltwater tank in addition to the cheap stick on thermometer on the glass to see if either wasn't working properly. I rarely see it running (based on the LED) and it seems most days the temp differential is between 2-4 degrees. I don't know if mine was bad or if it's just underpowered. Purchased a new 50w submersible/adjustable just now to see if I can actually get closer to 78.
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5.0 out of 5 starsGood Heater for a small aquarium
By Dean C. on January 7, 2016
Verified Purchase
This product is pretty much a plug and play. It will automatically sense when to warm the water and it has a 78+or- degree setting. I recommend this for the novice aquarium owner like myself! In the photo the heater is in the back with a red light.
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1.0 out of 5 starsI purchased this heater for my Fluval V Spectrum 5 ...
By Maryjean Hochberg on January 30, 2015
Verified Purchase
I purchased this heater for my Fluval V Spectrum 5 gallon tank and it was supposed to fit in the concealed part of the tank with the filter. It does fit there. The tank water temperature was 73 degrees when I put it in the tank, and that is what the water temperature remains at a week later. I am returning it and will continue in my search for a tank heater.
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3.0 out of 5 starsOkay
By LSUNurse on August 6, 2012
Verified Purchase
Keeps the 5 gallon chi between 72-74. But I don't think my Betta minds. I've had the heater since December 2011
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5.0 out of 5 starsPerfect for my 3.5 gallon acrylic tanks!
By C M on January 15, 2015
After two weeks of research to find just the right heater for my 3.5 gallon acrylic Betta tanks, I decided on this one and I'm glad that I did. This little heater keeps the temp at about 76° when the room temp is at 68°. Now we have two happy Bettas (separate tanks of course).

NOTE: The listing is misleading. It states that the heater "Maintains set temperature of 78° Fahrenheit", but that is not correct. The packaging says "Heater will increase aquarium temperature by 4°C / 7°F above ambient room temperature". It does not raise the temperature to 78°, but it won't go over 78°. If your room temp is 65°, it will raise the water up to and maintain 72°.
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Most Recent Customer Reviews

5.0 out of 5 starsGreat product

Works well in my Fluval 12gallon Edge tank.

Published 1 day ago by Anonymous
5.0 out of 5 starsFive Stars

Works

Published 1 month ago by David R.
5.0 out of 5 starsVery clean, modern design. Haven't plugged it in ...

Very clean, modern design. Haven't plugged it in yet but I trust Fluval products. You can barely see it on the back wall of my Fluval Edge. Read more

Published 2 months ago by Christy lee
4.0 out of 5 starsGood product

Good product. It keeps the water temperature consistent. I would have liked to see it keep the water a bit warmer. Read more

Published 2 months ago by Kcblk
4.0 out of 5 starsFour Stars

Not a bad heater for the price!

Published 3 months ago by gingerbunnies82
5.0 out of 5 starsFish are warm and happy!

Keeps my fish warm and I hope happy in my chilly home, all automatically.

Published 4 months ago by GEO
5.0 out of 5 starsworks fine. rarely come on

works fine. rarely come on. I keep my house at 70degF. If it is in front of black band in middle of tank (for black tanks). You hardly see it.

Published 4 months ago by Sterling J. Badon
1.0 out of 5 starsNOT ACCURATE

Not accurate after few months. Temps dropped from 80 to 74 and even killed live stock in tank.

Published 4 months ago by Cynthia
1.0 out of 5 starsAvoid for anyhting larger than a betta bowl.

Underpowered, couldn't even heat a 5 gallon Fluval Chi tank.

Published 4 months ago by polyspecific
4.0 out of 5 starsStylish and functional

I like this piece, it's stylish and allows for a good amount of plants to be put inside. I used it for my 12 gallon edge and it's fits well, although didn't fit with my fluval... Read more

Published 5 months ago by aubrey osborne

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