DaToo Aquarium External Heater in-Line Fish Tank External Heater 300W for Canister Filter
Condition: New
$49.99
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Availability:
In Stock.
Arrives
Saturday, Oct 31
At a glance
- Condition
- New
Features 5
- 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
Strong, durable, not afraid of any external force. Explosion-proof, Shatterproof and very Durable Suitable for 1/2" (12mm), 5/8" (16mm) and 3/4" (20mm) air tubing, you can replace according to need, very convenient and practical! No additional purchase required, regular cleaning of the heater, longer service life!
Specs 6
| Package Dimensions | 12.13 x 3.7 x 3.39 inches; 1.12 pounds |
|---|---|
| Manufacturer | DaToo |
| Item Weight | 1.12 pounds |
| Item Package Dimensions L x W x H | 12.13 x 3.7 x 3.39 inches |
| Brand Name | DaToo |
| Target Audience Keyword | fish |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Oct 31
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
Great Heater
Had this for a few years now and still works great!
Reviewed in the United States on July 9, 2026 by Rockr123
Error code E-1 Fixed
Update: Ok apparently it was set to max apon install and tank got so hot it gave off an error code that no one knows about. E-1. It works just fine now. Old message-Had this run overnight. And this morning I have an E1 error code. And there's no customer support to contact.
Reviewed in the United States on October 22, 2023 by Jeremy
Works great once you get it water tight
I'm genuinely surprised by a lot of the negative reviews because I haven't had a problem with it at all, it keeps my aquarium right at the temperature I need it to be. The only trouble was it was a pain getting it water tight but once it was water tight not a single issue. I do wish it had like a hook or something that I can hook to the wall or something because I'm not a fan of it just dangling there
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Reviewed in the United States on May 22, 2026 by david buck
Doesn’t work
Defective product. Unfortunately I had bought this before I had my tank set up in order to get all the equipment I needed and by the time I got it setup I could no longer return it on Amazon. As soon as I turned it on (giving it more than a day or running water through it) I instantly got an error code related to the temperature probes and the heater wouldn’t turn on. No fixes, no returning, now I just have it sitting still inline as I’ve been to lazy to remove it, only plus side is it doesn’t leak…
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Reviewed in the United States on September 11, 2025 by Ryne Roemer
Works well
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.
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Reviewed in the United States on June 25, 2025 by Anthony J. Rienzo
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.
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Reviewed in the United States on November 19, 2022 by Keifer K.
Not Reliable After Several Months.
Best value in-line heater. Works great so far. Holds its temp well. Let’s see if it lasts. Update: no longer reliable after nine months of normal use. One day it just stopped working and was flashing an error code. After a few resets it’s now working again but is stuck at 81 and won’t t heat to 84 for my Discus. Disappointed. Service isn’t great. The lady told me it’s winter now so it’s normal for the heater to struggle!?!? I don’t think so. My room is kept at 70.
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Reviewed in the United States on May 8, 2020 by J. Revell
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.
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Reviewed in the United States on March 1, 2025 by Phoenix Rivers