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DaToo

Aquarium External Heater in-Line Fish Tank External Heater 300W for Canister Filter

  • Based on 321 reviews
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Availability: In Stock.
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Arrives Sunday, Feb 8
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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 F to 95 F 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 F, 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, Lett Go!!

Description

The Best Aquarium External Heater For Your Needs DaToo Aquarium External Heater is specially designed for canister filter. Leading temperature control system, safe overheat protection, sturdy and durable, provides a warm, safe and comfortable living environment for your beloved fish! Specification: Voltage: 110~ 120V/60Hz Power: 300W Temperature Range: 68 ℉ to 95 ℉ Heater Size: Fit 1/2" (12mm), 5/8" (16mm) and 20mm Hose Product Features: - Leading temperature control system - Safe Over-Heat Protection - Sturdy And Durable - Replaceable Inlet And Outlet Head(Other brands don't have this) - LED Temperature Display in Fahrenheit - Additional accessories for your needs - Long Service Life - One Year Warranty Why Do I Select DaToo Aquarium External Heater? 1. LED display, temperature control system is more advanced, STM8 chip. 2. Safe over-heat protection, two temperature sensors, above the set temperature of 0.2 will stop heating. 3. Replaceable Inlet And Outlet Head, fit 1/2" (12mm), 5/8" (16mm) and 20mm Hose 4. Sturdy and Durable, german glass-ceramic heating tube and super-strength ABS shell, longer service life 5. One Year Warranty. Buy DaToo products with confidence. Packaging Includes: 1 300W DaToo Aquarium External Heater 5/8" (16mm) 2 1/2" (12mm) Head 2 20mm Head 1 Cleaning Brush 1 Instruction manual (Note: 1. Please read the instructions carefully before use. 2. Please make sure the water circulates completely and there are no bubbles before turning on the heater. 3. The heater is suitable for 80~120cm fish tank.)

Package Dimensions ‏ : ‎ 12.13 x 3.7 x 3.39 inches; 1.12 Pounds


Date First Available ‏ : ‎ October 9, 2019


Manufacturer ‏ : ‎ DaToo


Best Sellers Rank: #41,496 in Pet Supplies (See Top 100 in Pet Supplies) #126 in Aquarium Heaters


#126 in Aquarium Heaters:


Customer Reviews: 3.8 3.8 out of 5 stars (325)


Item Weight: 1.12 pounds


Manufacturer: DaToo


Date First Available: October 9, 2019


Item Package Dimensions L x W x H: 12.13 x 3.7 x 3.39 inches


Brand Name: DaToo


Target Audience Keyword: fish


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Feb 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Works well
Review Image by Anthony J. Rienzo Anthony J. Rienzo
Have to say it’s working great. I approached this very warily as some of the reviews are sketchy. I have to assume most of peoples problems are user error, and not understanding how to secure hosing so that it won’t leak. I’m using this inline with co2 on a fluval407 in our 55 gallon planted tank. I monitor the temperature at both input and output using a typical npt sensor and gauge and water leaving the tank is within a degree of water entering the tank, with temps matching what the heater reports. Reliable and accurate so far. Yes, don’t run your heater dry. Yes, you NEED hose clamps. Yes, it’s directional. Yes, it shuts off if temp is over set point. ... show more
Reviewed in the United States on June 25, 2025 by Anthony J. Rienzo Anthony J. Rienzo
    • Stay far away! Leaky and Dangerous!
This thing is absolute junk. I tied it into my new canister filter and immediately experienced leaks, even when sliding the hoses far down over the nipple and tightening the locking nuts until my fingers were bruised. Today, when I moved my canister filter a hose tore off the nipple and spilled several gallons of water before I could jam it back on. If that's not enough for you to believe you should stay away from this product, read on. As I tried to alleviate the problem I found that the tightening nuts on the nipples did very little to keep the hoses on. When reattaching the heater to the nipple BOTH sides cross-threaded (I've worked with fittings long enough to ensure I do not cross-thread them - these nipples are junk) and were nearly impossible to get off. While undoing the nipples the entire heater assembly separated from the housing - the valves, heating assembly and hosing literally spun in the housing. Needless to say that one day into owning this heater it is no longer safe to use, as the heating assembly has literally broken free of the housing. Additionally, the instructions included with the heater were incredibly vague on installation and were filled with grammatical errors. This could have been a great heater if DaToo had just created separate products for each size tubing instead of including three nipples for various sized tubing (it includes adapters for several sized hoses). As it stands, having fittings that are threaded into the heater body and nuts intended to hold the hose to the nipple make this prone to failure. You literally twist the nut to tighten the hose in the same direction that loosens the nipple from the heater assembly! This thing is begging for leaks! I hope my review helps other customers look elsewhere for an inline aquarium heater - if the details are too cryptic, let me leave you with this: do not purchase the DaToo In-Line Aquarium Heater; the cheap one-sized fits all nature of this product will fail on you. If, for some reason, you do decide to purchase this, I hope you're not left with gallons of water gushing from your tank like me. ... show more
Reviewed in the United States on June 13, 2020 by Tim
    • Works exactly like you would expect
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. ... show more
Reviewed in the United States on November 19, 2022 by Keifer K.
    • Works great with cannister filter
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. ... show more
Reviewed in the United States on July 1, 2024 by Paul
    • Good buy.
Been using this for 3 years now heating 170gal tank and it works good.
Reviewed in the United States on November 12, 2025 by Jessie briggs
    • Not to impressed
This product only worked for 1 year before it started throwing an E-8 error code and no longer works. It was great while it lasted. Not sure if i want to try another one or not based off the reviews, price, and quality.
Reviewed in the United States on December 22, 2025 by K. Gray
    • Space saver
I prefer the inline heaters vs the hang on side or submersibles. Just keep in mind that it requires water in the tube at all times. If you’re gonna clean your tank and stop the water from running just unplug it. If ever you get an “E code” i think it’s E15 but don’t quote me. It’s simply means the temperature of the water in the tank is higher than the heater parameters. So if your water temperature is 83° but the heater’s thermostat is set to 79° it will read that code. There’s nothing wrong with the heater nor did w heater make your tank warm but it can be used as a warning that your aquarium could be too warm which isn’t good for reef tanks. Possibly the room temperature is too hot. ... show more
Reviewed in the United States on March 1, 2025 by Phoenix Rivers

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