---
product_id: 2221553
title: "E 300 Watt Electronic Heater"
brand: "fluval"
price: "KSh21427"
currency: KES
in_stock: true
reviews_count: 8
category: "Fluval"
url: https://www.desertcart.co.ke/products/2221553-e-300-watt-electronic-heater
store_origin: KE
region: Kenya
---

# 300W precise heating power Real-time digital temp display Integrated fish guard safety E 300 Watt Electronic Heater

**Brand:** fluval
**Price:** KSh21427
**Availability:** ✅ In Stock

## Summary

> 🌊 Keep your tank perfectly cozy with tech that cares.

## Quick Answers

- **What is this?** E 300 Watt Electronic Heater by fluval
- **How much does it cost?** KSh21427 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/2221553-e-300-watt-electronic-heater)

## Best For

- fluval enthusiasts

## Why This Product

- Trusted fluval brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last 🔥:** Premium build quality backed by a 5-year warranty ensures long-term peace of mind.
- • **Smart Monitoring 🖥️:** Dual sensors with VueTech deliver real-time temperature updates you can trust.
- • **Precision Perfect 🌡️:** Set your aquarium temp in 0.5°C increments for flawless stability.
- • **Fish-Friendly Safety 🛡️:** Advanced fish guard prevents burns, keeping your aquatic friends safe and stress-free.
- • **Set & Forget Convenience 🔧:** Push-button controls and a clear LED display make adjustments effortless and accurate.

## Overview

The Fluval E 300 Watt Electronic Heater is a cutting-edge aquarium heater featuring a digital microprocessor with dual temperature sensors for ultra-precise control. It continuously monitors and displays water temperature in real time, allowing adjustments in 0.5-degree increments. Designed with an integrated fish guard for enhanced safety, this 300W heater ensures stable, reliable warmth for freshwater and saltwater tanks. Its premium build and 5-year warranty make it a trusted choice for serious aquarists seeking consistent, worry-free temperature management.

## Description

The most technologically advanced aquarium heater available today, Fluval E300 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.

Review: ⭐️⭐️⭐️⭐️⭐️ Precise, stable heating with excellent safety features - The Fluval E200 electronic heater has been rock solid in my aquarium. What really sets it apart is the temperature stability and accuracy. Once set, it maintains the water temperature extremely well without noticeable swings, which is critical for fish health. The digital display is clear and easy to read, and I appreciate being able to adjust the temperature precisely instead of guessing with a dial. The heater reacts quickly when the temperature drops and shuts off properly once the target range is reached. Build quality feels premium and well thought out. The protective casing adds peace of mind, especially in tanks with active fish. It also feels safer than traditional glass heaters thanks to its internal safety features. Pros: • Very accurate temperature control • Clear digital display • Stable heating with minimal fluctuation • Strong safety design and quality build • Ideal for medium to larger aquariums Cons: • Higher price than basic heaters • Takes a bit of space in smaller tanks Overall, this is a reliable, high-quality heater that’s worth the investment if you care about consistency and safety. Perfect for anyone upgrading from basic heaters or running a larger, more sensitive setup.
Review: GREAT HEATER - I read many reviews before I made my mind up on this heater. I will say I am sold on FLUVAL, as I currently own 2, 306 filters, 2, Q2 air pumps, and lastly 1, E200 and one E300 heater. I could not make up my mind with the first E200 or go with a E300 for a 55, I have two, am happy with both so this is about both since nothing but capacity changes with them, functions are the same. I can say, I had the old school type heaters, which seemed ok but had a hard time setting my temps just right. You know the drill, set the dial and wait a day, turn it back some, turn it up some, what a waste. With this heater it is SET and FORGET. With the color changing display you know what it is doing, or more so if there is a temp change more than 1 degree, it lets you know. I do have thermometers, the strip kind, I know I should get the real ones, howerver as the Fluval gives a real time, real temp display I do not think I will, I have also and do still, since these are new to me, check with a laser temp meter, so far both are to with in half a degree of the setting, Yes they do need water flow to work, so if you have HOB filter they would need to be close to that, I use canister filters with spray bar, so no problem there. One BIG plus for me, in my thoughts is the gaurd that keeps my fishes from rubbing up against a hot tube and burning themselves. The side mount is also usefull, as I have it on one of my tanks, my fish like the corner I would like to put it in, best second location is to the front, and the agles attachment lets you veiw the display. All in all, Very good, accurate heater, great display, great warnings if temp changes. I am so far happy with this unit, Hope if you a thinking of getting one of these do not hold back, In my opinion they work very well and you will be glad you did.

## Features

- 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001VMSK0I |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #13,762 in Pet Supplies ( See Top 100 in Pet Supplies ) #28 in Aquarium Heaters |
| Brand | Fluval |
| Burner type | Radiant |
| Color | Blue |
| Customer Reviews | 4.2 4.2 out of 5 stars (6,090) |
| Date First Available | June 24, 2004 |
| Form Factor | Aquarium Heater |
| Fuel Type | Electric |
| Global Trade Identification Number | 00015561107747 |
| Heating Coverage | 100 square feet |
| Included Components | Fluval Advance Electronic Aquarium Heater (300 Watt) |
| Indoor/Outdoor Usage | Indoor |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 13.1 ounces |
| Item model number | A774 |
| Manufacturer | Rolf C. Hagen (USA) Corp. |
| Material | Plastic |
| Max Temperature Setting | 2 Degrees Fahrenheit |
| Min Temperature Setting | 20 Degrees Celsius |
| Mounting Type | Slim mounting bracket |
| Part Number | A774 |
| Pattern | Heater |
| Product Dimensions | 1.8"D x 3.3"W x 18.2"H |
| Recommended Uses For Product | For use in freshwater and saltwater aquariums |
| Room Type | Living Room |
| Size | E300 |
| Style | E300 |
| Switch Style | Push Button |
| Type of Bulb | LED |
| UPC | 015561107747 015561014168 |
| Usage | Indoor |
| Voltage | 230 Volts |
| 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 d… |
| Wattage | 300 watts |

## Product Details

- **Brand:** Fluval
- **Color:** Blue
- **Form Factor:** Aquarium Heater
- **Indoor/Outdoor Usage:** Indoor
- **Power Source:** Corded Electric

## Images

![E 300 Watt Electronic Heater - Image 1](https://m.media-amazon.com/images/I/61AOPqZZuxL.jpg)

## Available Options

This product comes in different **Pattern, Style** options.

## Questions & Answers

**Q: Just can't seem to adjust the temp.  It flashes 77, but the temp stays at 75.  Why?**
A: I was having the same problem, though mine was stuck at 74.5--it stayed blue and never got higher, though it was set to 77. I called Hagen, and they said try unplugging it for 10 minutes, then plug it back in to see if that helps. It didn't; they'd said if that was the case it was defective and to return it. Mine was <1 week old.

**Q: I just bought this item September of last year and it wont let me adjust the temperature after the initial setting when I first had it**
A: So you move the adjusting orange dial/thingy and doesn't change temp? Some times you have to move it all the way, let it return to the neutral position and the move it again to and so on. If that doesn't work, it may be faulty, contact Fluval, these have good warranty.

**Q: does this heater go in the tank**
A: To clear any confusion, the heater is fully submersible to 39 inches. The photos in the instruction showing tank placement are misleading. The ones marked with an X means do not let it hang by the cord and do not just lay it on the bottom of the tank. Rest assured that the unit is sealed well and you are better off fully submerging the unit to prevent water evaporation from negatively affecting the heater.

**Q: Will I have "low flow" problems running only sponge filters?**
A: Your air pump running the sponge filters circulate the water.  The pump power will determine whether or not there is “low flow.”

## Customer Reviews

### ⭐⭐⭐⭐⭐ ⭐️⭐️⭐️⭐️⭐️ Precise, stable heating with excellent safety features
*by A***Y on December 23, 2025*

The Fluval E200 electronic heater has been rock solid in my aquarium. What really sets it apart is the temperature stability and accuracy. Once set, it maintains the water temperature extremely well without noticeable swings, which is critical for fish health. The digital display is clear and easy to read, and I appreciate being able to adjust the temperature precisely instead of guessing with a dial. The heater reacts quickly when the temperature drops and shuts off properly once the target range is reached. Build quality feels premium and well thought out. The protective casing adds peace of mind, especially in tanks with active fish. It also feels safer than traditional glass heaters thanks to its internal safety features. Pros: • Very accurate temperature control • Clear digital display • Stable heating with minimal fluctuation • Strong safety design and quality build • Ideal for medium to larger aquariums Cons: • Higher price than basic heaters • Takes a bit of space in smaller tanks Overall, this is a reliable, high-quality heater that’s worth the investment if you care about consistency and safety. Perfect for anyone upgrading from basic heaters or running a larger, more sensitive setup.

### ⭐⭐⭐⭐⭐ GREAT HEATER
*by F***3 on April 11, 2012*

I read many reviews before I made my mind up on this heater. I will say I am sold on FLUVAL, as I currently own 2, 306 filters, 2, Q2 air pumps, and lastly 1, E200 and one E300 heater. I could not make up my mind with the first E200 or go with a E300 for a 55, I have two, am happy with both so this is about both since nothing but capacity changes with them, functions are the same. I can say, I had the old school type heaters, which seemed ok but had a hard time setting my temps just right. You know the drill, set the dial and wait a day, turn it back some, turn it up some, what a waste. With this heater it is SET and FORGET. With the color changing display you know what it is doing, or more so if there is a temp change more than 1 degree, it lets you know. I do have thermometers, the strip kind, I know I should get the real ones, howerver as the Fluval gives a real time, real temp display I do not think I will, I have also and do still, since these are new to me, check with a laser temp meter, so far both are to with in half a degree of the setting, Yes they do need water flow to work, so if you have HOB filter they would need to be close to that, I use canister filters with spray bar, so no problem there. One BIG plus for me, in my thoughts is the gaurd that keeps my fishes from rubbing up against a hot tube and burning themselves. The side mount is also usefull, as I have it on one of my tanks, my fish like the corner I would like to put it in, best second location is to the front, and the agles attachment lets you veiw the display. All in all, Very good, accurate heater, great display, great warnings if temp changes. I am so far happy with this unit, Hope if you a thinking of getting one of these do not hold back, In my opinion they work very well and you will be glad you did.

### ⭐⭐⭐⭐⭐ Fluval E 200 - Best Aquarium Heater I've Ever Owned
*by K***B on December 23, 2018*

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.

## Frequently Bought Together

- Fluval E 300 Watt Electronic Heater
- PAIZOO Fish Tank Digital Thermometer Accurate LED Display to ±0.9°F Tank Thermometer Aquarium Temperature Measurement Suitable for Fish, Axolotl, Turtle or Aquatic
- API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-colored

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-03-02*