---
product_id: 164570787
title: "Aquarium External Heater in-Line Fish Tank External Heater 300W for Canister Filter"
brand: "datoo"
price: "$191"
currency: NZD
in_stock: true
reviews_count: 8
url: https://www.desertcart.nz/products/164570787-aquarium-external-heater-in-line-fish-tank-external-heater-300w
store_origin: NZ
region: New Zealand
---

# Overheat protection Easy to clean Precise temp control Aquarium External Heater in-Line Fish Tank External Heater 300W for Canister Filter

**Brand:** datoo
**Price:** $191
**Availability:** ✅ In Stock

## Summary

> 🐠 Keep your fish happy and thriving with DaToo!

## Quick Answers

- **What is this?** Aquarium External Heater in-Line Fish Tank External Heater 300W for Canister Filter by datoo
- **How much does it cost?** $191 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/164570787-aquarium-external-heater-in-line-fish-tank-external-heater-300w)

## Best For

- datoo enthusiasts

## Why This Product

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

## Key Features

- • **Safety First:** Dual temperature sensors ensure your fish are always safe and sound.
- • **Built to Last:** Crafted from explosion-proof glass-ceramic and super-strong ABS plastic for unmatched durability.
- • **Peace of Mind Warranty:** Enjoy a one-year warranty for worry-free fishkeeping.
- • **Versatile Compatibility:** Includes three interchangeable inlet/outlet sizes for all your canister filter needs.
- • **Ultimate Temperature Control:** Experience the perfect aquatic environment with advanced STM8 chip technology.

## Overview

The DaToo Aquarium External Heater is a 300W in-line heater designed specifically for canister filters, featuring advanced temperature control, dual safety sensors, and durable construction. It offers a temperature range of 68 ℉ to 95 ℉, ensuring a safe and comfortable environment for your aquatic pets.

## Description

Full description not available

## Features

- Perfect Aquarium External Heater For Your Needs: For every hobbyist or professional fish breeder with a canister filter, a perfect external heater is essential. DaToo Aquarium External Heater is specially designed for canister filter. Leading temperature control system, precise overheat protection, provides a warm, safe and comfortable living environment for your beloved fish!!
- Leading Temperature Control System: For the health of fish, a precise and constant temperature is very important. DaToo Heater's temperature control system uses advanced STM8 chip, which ensures that DaToo has a precise and perfect temperature control over the 68 ℉ to 95 ℉ range. Just set the temperature that you need, DaToo will create a comfortable environment for your beloved fish. Very Easy! Clear and large LED display, only need a light glance, you can know the current water temperature.
- Safe Over-Heat Protection: DaToo Aquarium External Heater has two temperature sensors, one at the heater inlet and the other at the outlet. This makes DaToo heater can be more accurate to measure temperature change. When the temperature exceeds the set temperature by 0.2 ℉, the heater immediately stops heating, the maximum to protect the safety of the lovely fish.
- Replaceable Inlet And Outlet: For different Canister Filter needs, we have prepared three different sizes of inlet and outlet heads in the box, 1/2" (12mm), 5/8" (16mm) and 20mm. You can choose a appropriate head as needed. A cleaning brush is also in the box and you can use it to clean the inside of the heater. DaToo has prepared everything for you. No extra purchases, save your money!
- Sturdy & Durable & One Year Warranty: Heating tube is made of German imported glass-ceramic, which is explosion-proof, shatterproof and very durable. The shell of the DaToo Aquarium External Heater is made of super-strong ABS plastic, which makes it unafraid of any external forces, nearly indestructible. The service life is 1.5 times that of similar products. One Year Warranty, let you rest assured to choose our products. JUST DO IT, Let’t Go!!

## Images

![Aquarium External Heater in-Line Fish Tank External Heater 300W for Canister Filter - Image 1](https://m.media-amazon.com/images/I/61WTuWffmPL.jpg)

## Questions & Answers

**Q: Es que pongo el calentador y me aparece un mensaje de E2 que puede ser ?**
A: Puede ser escasez de agua, verifique si su pecera tiene suficiente agua y luego verifique si la tubería de agua conectada al calentador está llena de agua (asegúrese de que no haya burbujas en la tubería de agua). Si hay escasez de agua, agregue agua a su pecera y asegúrese de que la tubería de agua esté llena de agua antes de encender el calentador.
Si no hay escasez de agua, el calentador puede estar dañado, comuníquese con nosotros para reemplazarlo.

**Q: Would this fit the hose of a Fluval Fx6?**
A: The heater fits 1/2" (12mm), 5/8" (16mm) and  3/4”(20mm) Hose.

**Q: Will this heater remember the selected temperature after a power outage or will it reset to a default temp?**
A: This heater has a memory function. It can remember the selected temperature after a power outage.

**Q: Does anyone know how to access the settings? Long pressing the button does nothing and i cannot adjust the preset temperature.**
A: Push once to see temp. Setting , keep pushing again and again to change , runs up to 95 and then back down to 68, stop pressing when setting you want displays

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect for the use. :)
*by A***A on March 16, 2025*

Works just how it should. I loved it so much I bought one for my second tank. 3 years going strong.

### ⭐⭐⭐⭐⭐ Works exactly like you would expect
*by K***. on November 19, 2022*

I have been using this for about a month now with no complaints. I will say that the water flow has to go a specific direction or it will throw the over temp error code as you are feeding the water that it has heated across the temp sensor. The flow should go in from the bottom of the unit and out the top.It should also be noted that the temp is a little off, which I’m not overly worried about. I have it set to 77 Fahrenheit. It reads 76 on the display. If it drops under 76, it will heat to 77 and settle back at 76. My tank thermometer reads 78 all the time, so the way I see it, it is doing its job at keeping the temp consistent.

### ⭐⭐⭐⭐ Works great with cannister filter
*by P***L on July 1, 2024*

This heater is working great with my canister filter. Temperature accuracy is very close and well within any acceptable margin for any species of fish. My only complaint really is that it displays an error code rather than the current water temperature if the water is warmer than the current setting.

## Frequently Bought Together

- DaToo Aquarium External Heater in-Line Fish Tank External Heater 300W for Canister Filter
- FZONE Aquatic Glass Lily Pipe Set with Skimmer Inflow and Outflow for Aquarium Filter 5/8''(16/22mm) Tubing
- Glass CO2 Drop Checker – CO2 Monitor Kit for Aquarium Tank – Functional and Reliable – Transparent Drop Checker, 4dkh/pH Reagent Solution and Suction Cup

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-08*