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Fluval E Electronic Heater

by Fluval
3.9 out of 5 stars 350 customer reviews
| 25 answered questions
List Price: $78.99
Price: $55.97 & FREE Shipping. Details
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300-watt
  • Dual temperature sensors provide accurate and real time water temperatures
  • LCD temperature display available in both Fahrenheit and Celsius; Range of 68 to 93 degrees Fahrenheit
  • Fast heat technology built with a safety shut-off; Integrated fish guard to protect fish and invertebrates
  • Equipped with a slim profile mounting bracket; Colored display alert system
  • Suitable for aquariums up to 100 gallons;300 watts; 5 year warranty
13 new from $47.90 3 used from $34.86
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Size: 300-watt

Product Details

Size: 300-watt
Manual [PDF]|Please read the USER MANUAL for Instructions and Directions of Usage [PDF]
  • Product Dimensions: 2 x 1 x 14 inches ; 1.1 pounds
  • Shipping Weight: 1.1 pounds (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: B001VMSK0I
  • Item model number: A774
  • Average Customer Review: 3.9 out of 5 stars  See all reviews (350 customer reviews)
  • Amazon Best Sellers Rank: #14,421 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

5.0 out of 5 starsSo Far, I'm loving this...finally found a decent and reliable heater?
By Mark L on November 28, 2010
Size: 300-watt
Love the features...absolutely love the fact it has an integrated heater guard....seems well made...love the integrated temp display (BTW mine is showing an accurate temp reading)...love the ease in accurately modifying temp.

Longer version: Anyone who is serious about tropical/saltwater healthy fishkeeping should take their water temperature very seriously (unfortunately, it seems few do). In my experience, there are few well-made, reliable heaters out there regardless of how much you are willing to pay (my kingdom for a decent/reliable heater I'd always say!).

I used Hagen/Tronics for years and found them to be the best money could buy...(and they were competitively priced, about 40 bucks for a 200W submersible). Another reason I liked the Tronics is that I have heater guards that fit them (another often overlooked concern in my opinion). Unfortunately, they quit making the Tronics and eventually my backups were gone. I have since been on a very frustrating journey... I've tried all kinds (including recently Marineland Stealth and Hydor....which I was told were some of the better ones out there...they sucked... 2 Stealths failed closed (overheated, thank goodness for my close monitoring)--The Hydor could not maintain temperature (wild temp swings)....everything else I looked at and read about seemed like more of the same chinese junk. Although I'd read about some reliability issues, I was about to pull the trigger on the very expensive JBJ True Temp Digital controlled heater....when someone suggested this one.

I will update this review once I've logged some hours...but I'm very optimistic about this model!

NOTE: Some seem to think this is not Submersible...though not documented clearly and implied otherwise, it IS FULLY SUBMERSIBLE (see my response to the previous post).

Update: 2 years later and both units are going strong...highest recommendation.
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5.0 out of 5 starsGreat color coded display
By Grusonii on November 21, 2010
Size: 200-watt Verified Purchase
Have this heater now in my fish tank for about a year. The heater itself has a glass housing. The outer casing visible in the picture is plastic. That's great to avoid any fish getting burned by the heater. Target temperature adjustment is straight forward following the instructions. I strongly doubt that any fish could change the adjustment (done by the little red lever which, granted, is in the water as well) as I had read somebody else posting. I use the heater fully submerged.

One thing to be aware of is that the heater needs to be in "flowing" water when being mounted vertically. Otherwise the built in temperature sensor will get triggered and report an error (rising warm water will create and "overheat" condition which switches off the heater). I don't have much water flow in my fish tank so I decided to mount the heater horizontally an inch or two above the gravel. Works perfectly this way.

The best part of the heater is the color coded built in temperature display. As long as the water has a temperature within one or two Fahrenheit of the target temperature the display is green. If the water temperature rises the display becomes red (while of course also displaying the exact temperature as a number). If rising an additional few degrees the display blinks red. Similarly if the water temperature goes below the target range the display becomes blue. This way one can quickly check that the water has the right temperature.

Update Aug 2013:
A few folks pointed out that the manual for the heater recommends against putting it in horizontally. That's correct so do this at your own risk. It may void the warranty. I'd definitely advice to not submerse the heater fully unless the power outlet is a GFCI type so you can't shock yourself or the fish.Read more ›
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5.0 out of 5 starsNice features
By natas on March 16, 2010
Size: 300-watt
I recently upgraded my 55 gallon aquarium heater to the Fluval E Series 300w. It does an excellent job of maintaining temp and comes with a tough exterior cage (prevents disasters). I really enjoy the temp display screen, but some might find the bright light a problem at night (if you're looking for a dark room). I've bought several heaters over the years, from different brands, and this is by far my favorite.
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4.0 out of 5 starsso far i am enjoying this Heater.
By J-Man on November 4, 2011
Size: 300-watt Verified Purchase
I have had a freshwater aquarium for 10 years now, with different heaters. i have had this item for about 10 days and found that it is keeping my 55 gallon aquarium at the set temp, give or take 1 degree. the display is easy to read and is very accurate with the 2 standard thermometers i have in the tank. i have 2 penguin 350 filters, a 170 power head, and 2 bubble stones, very low maintenance tank. i have had the the power head and one of the filters off and still did not have a low flow issue like some of the other reviews. my room temp has been ranging from 66 F -76 F with the strange weather we are having here on the east cost, the heater is set at 77 F and the temp of the tank ranges from 76 F to 77 F. When i set up my additional tanks for my two children's rooms i will diffidently get this for them.
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5.0 out of 5 starsBest heater for an aquarium...ever!
By Freki on October 4, 2011
Size: 300-watt Verified Purchase
After a lot of research, I had decided on buying a titanium heater with a controller. But when I went to look on Amazon for such a product, they were all very pricey and none offered "Prime" for a quality product. So I stumbled upon this beauty.

I have used many of the cheap models (Hagen, aqueon, etc) as well as the Visi-Therm Stealth and Eheim Jager. This heater by far blows them out of the water! It has a digital display which tells you down to the 0.5 degrees what your temp is as well as what your temp is set at (when you are setting the temp). This is dead-on accurate when I've tested it with a thermometer. When it is more than 1 degree outside your setting, it turns either blue (cold) or red (hot). I have yet to have an overheat condition, but the packaging says it will shut itself off if it detects one; so it has a built-in controller! The heater is fully submersible and looks attractive in my opinion. The suction cup mounting plate isn't cheap like suction cups on other heaters. It heated my 29 gallon hex aquarium up from ~60 degrees to 78.5 degrees in just under a couple hours, and didn't go even 0.5 degrees over.

I've had it in about a week or so now, and I couldn't be happier. It's really nice to be able to look across the room and tell in a glance from the softly glowing green screen that my temp is right where it should be. I highly recommend this heater as a cheaper, high-quality alternative to a temp controller.
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Most Recent Customer Reviews

5.0 out of 5 starsGreat heater! Needed a replacement for the original heater ...

Great heater! Needed a replacement for the original heater and this has a bright display and works very well.

Published 8 hours ago by Lori A. Lehman
5.0 out of 5 starsTerrific! Set and forget.

A terrific update in design and function. I really like the built in thermometer display. Compliments my Fluval G6 filter perfectly. Super easy to set and forget.

Published 6 days ago by onehappydogstl
3.0 out of 5 starsdoes not keep temp where it should even with 2 ...

does not keep temp where it should even with 2 in a 75 gallon tank, have to set to 2 degree higher

Published 17 days ago by Robert Yaniak
5.0 out of 5 starsFive Stars

this item 120v or 240 or both

Published 18 days ago by Amazon Customer
2.0 out of 5 starsone works fine, another one had the light burn out for ...

I bought three of these; one works fine, another one had the light burn out for the display, and the third malfunctioned heating my aquarium to 90 degrees. Read more

Published 18 days ago by Amazon Customer
4.0 out of 5 starsNice Smart Heater.

Good heater but a bit weak for a 10 gallon tank. My tank is 12 gallons and it has a tough time keeping up with heating demands. Read more

Published 26 days ago by ghost chaser
5.0 out of 5 starsFive Stars

Great heater does well

Published 1 month ago by Ryan Ray Reece
5.0 out of 5 stars... for about 6 weeks now and I am very pleased. I enjoy the design...

I've been using this heater for about 6 weeks now and I am very pleased. I enjoy the design and the easiness of temperature control due to the LED display. Read more

Published 1 month ago by Nadine
5.0 out of 5 starsway to go Fluval

Amazing heater. Works amazingly. Bought a second one for another tank. Love that the plastic protects the fish from potential burn, and you can tell from across the room by what... Read more

Published 1 month ago by harold rush
5.0 out of 5 starsSaWeet !

So,...read all reveiws,..and being burnt on heater after heater,.i leaped,..i bought 2 !, 50watt for 10 gal frog tank,..and 300watt for tropical 55 gal tank,..3 days in now,. Read more

Published 1 month ago by Yvonne M. Zimmerman

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