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Availability:
In Stock.
Arrives
Nov 17 – Nov 18
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At a glance
- Condition
- New
- Size
- E100
- Model
- A772
- Dimensions
- 1.8"D x 3.3"W x 15.3"H
- Weight
- 0.31 kg
- Color
- Black
- Form Factor
- Tabletop
- In the box
- HAGEN FLUVAL E 100W HEATER
- Warranty
- 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.
Features 5
- Continuously monitors and displays aquarium water temperature in real time
- Intelligent digital microprocessor monitoring system with dual temperature sensors
- Ensures the safety and well-being of your aquarium inhabitants
- Precision temperature control allows settings in 0.5-degree increments
- Integrated fish guard provides advanced protection
Description
The most technologically advanced aquarium heater available today, Fluval E100 Advanced Electronic Heater with VueTech technology delivers peace of mind thanks to several excellent features.Equipped with an intelligent digital microprocessor monitoring system with dual temperature sensors, this heater continuously monitors and displays aquarium water temperature, ensuring the safety and well-being of your aquarium inhabitants.
Specs 28
| Brand | Fluval |
|---|---|
| Color | Black |
| Form Factor | Tabletop |
| Indoor/Outdoor Usage | Indoor |
| Power Source | Corded Electric |
| Indoor Outdoor Usage | Indoor |
| Heating Method | Radiant |
| Recommended Uses For Product | Decoration |
| Mounting Type | Tabletop Mount |
| Room Type | Bedroom |
| Heat Output | 100 watts |
| Fuel Type | Electric |
| Voltage | 230 volts |
| Amperage | 0.43 A |
| Min Temperature Setting | 60 °F |
| Max Temperature Setting | 95 °F |
| Item Dimensions D x W x H | 1.8"D x 3.3"W x 15.3"H |
| Item Weight | 0.31 kg |
| Brand Name | Fluval |
| Model Number | A772 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Unit Count | 1 Count |
| UPC | 015561107723 |
| Global Trade Identification Number | 23 |
| Item Type Name | HAGEN FLUVAL E 100W HEATER |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Part Number | A772 |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Nov 17 – Nov 18
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Easily the best heater I've used in my 40+ years in the hobby
Size: E100
I spent a LOT of time figuring out which heaters to get to replace my eheim jager heaters that I'd used for 20+ years. In reading all the reviews of every heater and trying a bunch of different ones, the E series from Fluval was far and away the winner. I have been in the hobby 40+ years and have had that dreaded moment when you come home to a tank of dead fish b/c the heater malfunctioned. NO ONE in reviews for this heater had talked about that when I started shopping, and with the 8 I now I have, I can report the same - NO PROBLEMS - my tanks stay where they are supposed to! I've also had glass on heaters break - becoming a live wire in the fish tank. With these heaters - again, NO PROBLEMS - and the reviews support it. This heater is strong, and built to be nearly indestructible. I've also had, and always had, heaters that became difficult to adjust over time. That would slowly heat to a lower or higher temperature, and that became very difficult to adjust. This has led to disease outbreaks due to temperature fluctuations. With this heater - I've again had NO PROBLEMS! Most of the complaints I saw about this heater were due to seeing LF - Low Flow blinking. I figured, if that was the biggest problem I'd have, then this heater was a HUGE WIN, and it has been. Not to say I haven't seen the dreaded LF indicator, but, I would state that I've always been able to address it. I run canister filters on all of my fish tanks and on all 8 of them, changing how the water flows out of the canister filter in the tank has resolved the issue. Sometimes it takes some fiddling - I'll give you that, but all 8 of mine work perfectly and when I see LF - I know something has changed in the tank and is causing issues (for me - typically it is related to large plants blocking flow). I LOVE the always on display, like love, love, love it! At a glance I can tell if there are problems in temperature. I also appreciate how easy it is to adjust temperature, just flick the switch left or right and you are good. Easy Peasy. In the end - I started with one, and slowly, over 4 years, have replaced 8 or my 10 heaters with these, and I couldn't be happier. They are easily the best heater I've had in my many years keeping fish. That said - I do have 2 complaints. 1 - Replacing the rubber suction cups is currently very difficult b/c Fluval doesn't make replacements very available. 2 - It is very difficult to clean the heater housing if (when!) it becomes covered with hair or brown brush algae. Neither of those things are deal breakers for me, but are worth mentioning.
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Reviewed in the United States on February 28, 2026 by Russell D. Carroll
Excellent Heater but Follow the Instructions to Prevent Damage.
Size: E100
I was a little concerned about this item from some of the reviews, but decided to get one anyway as I have had great luck with Fluval in heaters, lighting, and filtration. I think people having cracking issues with the glass tube might not have read the instructions properly. It does recommend letting the heater sit in your aquarium for 20 minutes before plugging it in to let it adjust to the water temperature. It also recommends having the water close to the temperature you want your aquarium to be before turning it on. I think this is to prevent overheating or thermal shock if you heat the tube before you place it in the water, which it specifically says not to do. I have had no problems with this heater. It works as it should and I do love having the digital temerature gauge right on the heater. Best part, the digital temp on the heater matches the temp on my separate digital thermometer, so it all seems to be accurate as well. Definitely recommend this heater!
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Reviewed in the United States on September 12, 2026 by David J.
Works great with a few tips.
Size: E100
I generally don't leave reviews for products, even ones I love, but I wanted to clear up an issue people were having with this heater in comparison to others. The temperature indication is spot on, very accurate. The design is sleek and well constructed. The issue I was having with this unit was not being able to maintain tank temperature in a very cold room, even though I oversized the wattage/gallons ratio by over double the recommended specifications. I believe the shrouding around the glass mildly hinders heat distribution so it is important that this unit gets adequate flow from the filter. I placed the heater directly under my filter return but still randomly had scenarios where the temperature dropped and stayed in the blue, even for a couple days. Then it would rise to green and maintain no problem. What I realized over time was whenever I did water changes or added water, the temperature dropped that night, even if the water added was warmer than the tank water. As the water level dropped over the next few days from evaporation, the temperature rose back up to normal. My hypothesis: If the water level in the tank is a hair too high, there is less disturbance created from the filter return, even though you are still achieving the same turnover rate. Try either lowering the water level in half inch increments until the temperature is able to maintain, or try rotating the heater sideways to achieve more flow through the shrouding. I recommend the first option because turning the heater sideways looks ridiculous with the digital display. I now maintain 77-78 degrees constantly in a 55 degree room and would purchase this heater again. Fluval makes excellent products.
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Reviewed in the United States on December 3, 2017 by Matt
Very good product
Size: E100
I just bought my second one of these. Unfortunately, the one that arrived wouldn't heat. The display worked. It allowed me to set the desired temperature, and it accurately displayed the actual tank temperature, but no heat at all. Amazon sent a replacement and it's fine. Pros: - I like the precision of setting the desired temperature with a digital display rather than an imprecise knob. In this day and age you'd think they'd all be digital but they're rare. - The actual tank temperature is also displayed digitally and is very accurate. - The heater maintains the tank temperature very precisely. I have a high quality Thermapen kitchen thermometer and it always shows the tank temperature to be +/- 0.2 of what I have set. - Contrary to many of the other reviews here, I find the "LF" low flow indicator to be quite helpful in choosing the best spot in the tank for the heater. In my case, I found that placing the heater near the filter intake strainer most readily eliminated any "LF" displays. Cons: - They are VERY slow to heat water that is even just a degree or two below the set temperature. Not an issue, though, in typical use of just maintaining the set temp. - Inside the plastic shield, it's still just a plain old glass tube.
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Reviewed in the United States on December 13, 2018 by James O'Neill
A great product!
Size: E100
I’ve used Fluval products for years. This heater is really nice! It maintains a steady temp in my aquarium, and I like the black plastic housing—it blends in much better with my tank. I bought this heater to replace another Fluval heater that was 3+ years old, and just beginning to be really inaccurate. I also replaced the Fluval heater in my 2nd aquarium; it was still working well, but it was 4+ years old so I felt safer replacing it, also. Fluval might be more costly than other brands, but their quality is well worth it.
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Reviewed in the United States on October 11, 2026 by Amazon Customer
FAILED after 8 days.
Size: E100
This review is for the E-100. I ordered this heater for a 20 gallon planted aquarium, containing 2 Angels, a Green Severum, 8 Harlequin Rasboras, 8 Neons, and a Cory Cat (all young small fish, which will be transferred to a 56 gallon column tank in the future). This heater sells for $59 in stores, and $52 on websites, so at $29.95 from Amazon I jumped at it. Besides, it's a pretty cool state-of-the-art item, and I'm a gadget-guy. I was however, slightly hesitant - there are a lot of warnings and caveats about placing it in a high-flow area, and some bad reviews for underpower and malfunction. But as I mentioned - at $29.95, it was too good to pass up. The box arrived from ASAVINGS, packed loosely in a plastic bag, with no padding, (disconcerting, since this product is largely made of glass) and without an invoice or packing slip. The corners of the Fluval box were slightly "bruised", which didn't fill me with confidence. But there was no apparent damage to the heater. I mounted the heater between two AquaClear HOB filters, to benefit from good flow. This places it fairly in the center of the rear glass. As the instructions suggest, I let the heater acclimate to the tank for 20 minutes before plugging it in. After powering up, I set the temp to 76.5 F. The display began in blue, and went green after about an hour, where it displayed 75.0 F. It climbed to 76.0, and remains there, which is fine. I also have two separate/independent indicators in the tank - a glass thermometer, and a digital probe. The glass thermometer reads 76, and the probe reads 77.5 (the probe has always displayed higher for some reason). Thus, I'm confident that the Fluval E-100 is operating correctly. Since it's only been operating for 36 hours, I realize I'm not offering a long term evaluation. There is one shortcoming, which is rather irritating, and is immediately noticeable, for which I didn't deem worthy of 5 Stars - no "On" indicator. I consider it comforting to know if a heater is "On" or not. FLUVAL TAKE NOTE!! ____________ [UPDATE]: After 72 hours, the unit is running perfectly. The display has remained GREEN, and occasionally cycles between 76.0 and 77.0, which is half a degree on either side of my setting. I've noticed it 'wink' up and down by half a degree when it's sensing a change, and then settle on one or the other after 30 seconds or so. This is the actual temperature it's sensing, and is fluctuating due to water flow around the sensor(s). Live plants in the vacinity are 'waving', which is an indication of good flow. I have yet to experience a Low Flow alarm, or a malfunction. ____________ [UPDATE]: On day nine, I noticed the display showing 77.5, which is higher than I'd seen before. It stayed there for awhile, so I decided to adjust it. But it would only flash to adjust-mode when the lever was pushed to the RIGHT (indicating something was wrong). Then it wouldn't adjust to a lower temp, no matter what I did. Total failure. I unplugged it, and plugged in my original heater. I only paid $29.95 for this heater, so I don't feel totaly robbed. This heater will be returned. [UPDATE]: Thank goodness for Amazon's EXCELLENT Customer Service!! They've contacted the seller on my behalf, to resolve the matter. _________ Not recommended. .
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Reviewed in the United States on January 9, 2014 by Bill Wiegert
works fast and consistent
Size: E100
wonderful heater. consistent temp with no issues
Reviewed in the United States on July 26, 2026 by Mama C
Fluval E
Size: E100
De muy buena calidad y la pantalla incorporada mejora y facilita mucho la experiencia
Reviewed in the United States on October 1, 2026 by Alejandro Richard