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Fluval E200 Advanced Electronic Heater, 100-Watt Heater for Aquariums up to 65 Gal., A773,Black



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  • Aquarium heater with dual temperature sensors provide accurate and real-time water temperatures
  • LCD temperature display available in both Fahrenheit and Celsius; with a range of 68 to 93 degrees Fahrenheit
  • Fast heat technology built with a safety shut-off and integrated fish guard to protect fish and invertebrates
  • Equipped with a slim profile mounting bracket and colored display alert system
  • 200-watt heater for freshwater and saltwater aquariums up to 65 gallons with a 5-year warranty

Specification: Fluval E200 Advanced Electronic Heater, 100-Watt Heater for Aquariums up to 65 Gal., A773,Black





IndoorOutdoor Usage


Product Dimensions

‎2"D x 1.25"W x 13.75"H

Mounting Type

‎Suction Cups

Heating Coverage

‎65 square feet

Burner type



‎230 Volts

Max Temperature Setting

‎2 Degrees Fahrenheit


‎Rolf C. Hagen (USA) Corp.

Part Number


Item Weight

‎1.01 pounds

Country of Origin


Item model number


Is Discontinued By Manufacturer











‎200 watts

Item Package Quantity




Included Components

‎All Items listed in Description

Batteries Included


Batteries Required


Warranty Description

‎5 years, Fluval E Series Heaters are guaranteed against defects in material or workmanship under normal aquarium usage and service for 5 years. We offer a 5 year guarantee on all nonreplaceable parts which means that the heater will be repaired or replaced at the manufacturer's discretion, free of charge, when the complete heater is returned with proof of purchase and postage paid. This warranty does not apply to any heater that has been subjected to misuse, negligence, or tampering. No liability is assumed with respect to loss or damage to livestock or personal property irrespective of the cause thereof.

5 reviews for Fluval E200 Advanced Electronic Heater, 100-Watt Heater for Aquariums up to 65 Gal., A773,Black

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  1. Khushwinder Mann

    The media could not be loaded.

     I received this product in a damaged and used condition, which was disappointing. The item clearly showed signs of white minral deposit on black plastic, and the packaging was in poor shape. I expected a new and undamaged product, so this was a letdown. I would advise caution when purchasing from this seller to avoid a similar experience.

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  2. Keith B

    First off, I’m a Mechanical Engineer with 31 years of experience and have a considerable amount of experience related to heat transfer. I’ve also kept aquariums for 36 years and currently have 3. I’ve had a Fluval E 200 watt heater in a 75 gallon tank for almost 3 years and it’s performed flawlessly. I’ve read tons of reviews stating the low flow warning is a problem, but that warning is an attribute of this heater. Tank heaters are very compact for the amount of heat they generate and must exchange the heat to their surroundings efficiently or they’ll burn themselves out. Just imagine grabbing an old fashioned 100 watt incandescent light bulb that’s been on for several minutes …. now imagine that it’s a 200 or 300 watt bulb! Also think about the fact that the largest portable space heater you can buy and plug into a standard 120 Volt wall receptacle is 1500 watts. That’ll give you a perspective of how much energy 200 or 300 watts is. So yes, you absolutely need water flowing over the heater to carry heat off as opposed to it only heating the immediate area and then shutting off. My 75 gallon tank is fully covered and is in my basement which is typically 63 – 66 degrees in the winter and this 200 watt heater has always kept it within 1/2 degree of the 77 degree setting. I’ve had many different tank heaters through the years and will never buy anything but these again. As many others have said, being able to just glance over and see the green display indicating that the water temp is within 2 degrees of set point is very nice! I literally look at it every night before going to bed and casually glance at it during the day without even focusing on what the temp actually is. I’m sure many have had defective units but these heaters are wonderful when functioning properly. Oh and I put zero value into reviews stating any heater won’t work when the operating conditions aren’t given. How many gallons is the tank, what’s the ambient air temp, is the aquarium fully covered, etc, need to be known to evaluate whether sufficiently sized. Putting a 1500 watt heater in a well insulated 300 square foot room in your house will keep it toasty; putting that same heater in your outdoor shed in the winter ….. won’t help much. One last thing, I’m absolutely not a fan of putting a heater that’s considerably larger than required in a tank as I’ve seen advised many times. All heaters will eventually fail and if it fails in the on mode, I don’t want to cook my fish. I’d much rather have 2 smaller heaters in a tank than 1 over sized heater. That way if one fails and won’t shut off, the other heater either won’t come on at all, or will intermittently cycle to make up what the stuck heater can’t do. Heaters are designed to work and will last just fine even if they run a majority of the time. In fact many products will actually last longer if they can just run as opposed to “short cycling” as when they’re considerably over sized. I have a Clown Loach that’s between 8 – 10 years old and I have no intention of allowing a faulty heater to kill it or any other fish under my watch.

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  3. Adam

    Gone through several heaters and this one has lasted the longest so far. It’s easy to read and easy to change the temp. Very happy with it. I have it in a 39 gallon tank and it has no problem bringing it up from colder water with water changes either.

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  4. DeeJay

    I’ve gone through a number of heaters and, so far, this one is working better than the rest.

    On the plus side, this keeps the temp within +/- .5 degree (F) of where I set it and doesn’t fluctuate much at all. Since that’s what I want out of a heater, this one fits the bill. The LED back-lit LCD display is nice and makes checking the temp very handy with just a glance at the color. The microprocessor control makes setting the temp easy, as well. A flick of the switch in either direction will alter the setting by .5 degrees (F). Although not advertised as such, based on my research, I’m using mine fully submerged without issues. I read about issues with these being underpowered, but in my 29 gallon high, the 200 watt works great. My water is at a steady 77.2 degrees. The plastic guard is a unique feature and, I suppose, helps make sure no fish get injured. But, I’ve never had that issue, so I think it’s more about aesthetics than anything else.

    On the negative side, this is definitely larger than most other heaters of a similar rating. As you are not supposed to use it in a horizontal configuration, it might be too long for shallow aquariums. While the built-in thermometer is very steady, it’s not accurate. Mine is approximately 2 degrees low. At the factory default of 77, my water temp was 79.3 based on both my digital thermometer and standard glass thermometer. Turning it down to 75 is fine, but since it will reset to 77 automatically after being powered off (or a power outage), that’s somewhat annoying.

    Overall, this is one of the better heaters I’ve used. If the thermometer were more accurate, I’d give it 5 stars.

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  5. Grusonii

    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.
    As for my heater – it’s still in the tank, it’s still horizontally close to the gravel. Sadly the lever to adjust temperature settings ceased to work so the heater is set to 76F now, period. Might be a result of being permanently fully submersed or not.

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    Fluval E200 Advanced Electronic Heater, 100-Watt Heater for Aquariums up to 65 Gal., A773,Black
    Fluval E200 Advanced Electronic Heater, 100-Watt Heater for Aquariums up to 65 Gal., A773,Black


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