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Fluval M Submersible Heater

by Hagen

List Price: $37.99
Price: $24.04 & FREE Shipping on orders over $35. Details
You Save: $13.95 (37%)
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
Want it Monday, April 21? Order within and choose Two-Day Shipping at checkout. Details
200-watt
  • Built in reflective technology mirrors the surrounding colors, making the heater blend into your aquarium environment
  • Shock resistant Borosilicate glass; High density ceramic heat sick
  • Slim profile tube for easy placement; Easy to install
  • Exceptional performance and unsurpassed reliability
  • Suitable for aquariums up to 65 gallons; 200 watts; 3 year warranty
14 new from $16.99 2 used from $22.02

Frequently Bought Together

Fluval M 200-Watt Submersible Heater + API Freshwater Master Test Kit + Seachem Prime 500ml
Price for all three: $59.93

Buy the selected items together


Special Offers and Product Promotions

Size: 200-watt
  • Buy Used and Save: Buy a Used "Fluval M 200-Watt Submersible Heater" and save 42% off the $37.99 list price. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the "Amazon A-to-z Guarantee". See all Used offers.

Product Details

Size: 200-watt
  • Product Dimensions: 1.2 x 1.2 x 13 inches ; 6.4 ounces
  • Shipping Weight: 6.4 ounces (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B0027VQ0WM
  • Item model number: A784
  • Average Customer Review: 3.8 out of 5 stars  See all reviews (180 customer reviews)
  • Amazon Best Sellers Rank: #15,632 in Pet Supplies (See Top 100 in Pet Supplies)
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Product Description

Size: 200-watt

The Fluval M Submersible Aquarium Heater’s quality manufacturing utilizes superior components and construction. The Fluval M 200 Watts Electronic Heater is ideal for use in aquariums up to 65 gallons and has a temperature range of 66-86 degrees Fahrenheit. This sleek, compact heater can be trusted for exceptional performance and unsurpassed reliability. Unique only to the Fluval "M" series the reflective technology equipped in the Fluval M Submersible Aquarium Heater helps maintain the aquariums' natural look as the heater reflects the colors of the surroundings.


Customer Questions & Answers

Customer Reviews

These heaters seem to work great and look great.
Chris H
There are very clear markings on the heater tube showing minimum and MAXIMUM water levels, so this is not a fully submersible heater.
Amazon Customer
I liked the mirrored look and that it would blend in with the aquarium.
heather

Most Helpful Customer Reviews

59 of 59 people found the following review helpful By Loren Sandford on June 25, 2011
Size Name: 300-watt Verified Purchase
Don't be misled by the information on the packaging that says this heater should not be submersed completely. I called Fluval and was told that they were forced to put that in the instructions and on the unit for the sake of Canadian requirements. The unit is fully submersible and it keeps my aquarium at a more even temperature than any other heater I've purchased. In addition the temperature dial seems to be much more accurate. Good unit! Buy it!
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23 of 23 people found the following review helpful By Louis Winkelstein on September 10, 2010
Size Name: 200-watt Verified Purchase
This is a very nice heater. The reflective surface makes it blend in. It IS submersible and is about 12" long. Like all heaters, you have to tweak it to find out the precise setting .......... no problem. I recommend it.
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33 of 37 people found the following review helpful By Suzanne A. Herman on August 13, 2011
Size Name: 50-watt Verified Purchase
First, I selected 2 days shipping through Amazon Prime and received this item exactly on time, in the afternoon of the second day. It was packaged in a box with bags of air. I appreciated that since this is a fragile product.

The first thing I noticed upon opening the box was that this heater is huge for the wattage. Mine is 50 watts, to be used in a 10 gallon aquarium, and it is almost exactly the same height as the aquarium itself. Then when I put it in the aquarium it became clear that the reflective surface of the heater serves only to make it MORE visible. It just looks like this gleaming shiny metal object in there, and doesn't really seem to actually reflect the colors surrounding it, but instead it reflects the aquarium light above. Because of this I decided to lay it against the bottom back of the aquarium so that it is obscured by plants, and the cord goes right up the seam of the aquarium where it isn't noticeable. If you're buying this for its subtlety, you'll be disappointed.

BUT, despite this, I am pleased with my purchase to far. It has been keeping my 10 gallon betta tank appropriately warm, within a degree of the setting and that's all I really care about. I was going to get a Hydor Theo but this was bit cheaper. It seems to perform just as well. Granted I have only had it for about a day and a half, but I will update my review if the performance changes.

In case anyone's wondering, the heater appears to be some sort of metal or metallic material encased in glass, so it is fragile like other glass heaters. It's not made of metal on the outside.

Finally, I wanted to dispel the myth that this heater is not fully submersible.
Read more ›
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12 of 14 people found the following review helpful By Coderpitt on April 4, 2011
Size Name: 200-watt Verified Purchase
I purchased two of these for my 110 gallon tank. They keep the temperature right where I need it. My main issue is that there is a "do not place below this line" and it is about 1" below the "do not allow water below this line". My tank evaporates 2 inches in a week... so if I didn't fully submerge it, it would overheat due to lack of water. I've hard it submerged now for a couple of months with no problem; however, it is concerning that there is a max water level on a submergable heater. It works great and is working fully submerged, but I gave it a 4 because I suspect this might void the warranty.
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6 of 7 people found the following review helpful By Foxy on July 4, 2011
Size Name: 150-watt Verified Purchase
This is an excellent heater! We have a 44 gallon tank. Our tank has stayed at a constant 72 degrees since I started using this heater. Our last heater was a cheap piece of junk and we got what we paid for. But this heater has kept our tank a constant 72 degrees in winter and in summer, with our window ac running in the same room as our fish tank!
Great product!
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5 of 6 people found the following review helpful By RJG on November 12, 2011
Size Name: 300-watt Verified Purchase
I have many Fluval filters and have nothing but great things to say about them. So when I had a need for a couple of new heaters I didn't hesitate to order two Fluval M 200, one Fluval M 300 along with one Fluval E 300. I was so confident they would perform well that I disposed of the packaging set the temperature dial at 86 degrees and moved them into my two Discus tanks. Big mistake as they are unable of keeping the tanks in the desired 83-86 degree range. In fact they struggled to keep the tanks at 79 degrees. When you consider the ambient temperature in the room is 75 degrees this is not the hardest of tasks. I've run them fully submersed and as directed by the packaging," do not place below this line" and they perform equally badly under both conditions. Is it a calibration issue as proposed in other reviews? I'm not qualified to say but I can offer that they are simply bad products with confusing packaging; (submersible, not submersible) that did not work in my application. The one star is an unfortunate product the Amazon rating system as I would happily give it a well-earned zero star rating. In farness the Fluval E 300 is a great product and works as advertised.
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5 of 6 people found the following review helpful By CARRASQUEL on August 27, 2011
Size Name: 200-watt Verified Purchase
Really long! 12 inches long and 1 inch wide. Easy button on top displaying ideal water temperature for your fish. Temperature number display is easy to read on top of tube and the tube has 2 water wave graphics to let you know how deep to put it in water. The heater is used up to 65 gallon fish tanks! In my earlier experience with other heaters a long time ago "NEVER TURN ON HEATER OUT OF WATER! IT MIGHT EXPLODE" Internal acid might get on your skin severe pain.
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5 of 6 people found the following review helpful By law3165 on August 6, 2011
Size Name: 300-watt Verified Purchase
This is the first heater I have bought this brand and am very statisfied with it. It was much cheaper than the one I looked at in the pet store, same brand and watts. I would definately recommend this one!
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