DaToo Aquarium External Heater in-Line Fish Tank External Heater 300W for Canister Filter
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Availability:
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Sunday, Aug 2
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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
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!
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: #62,966 in Pet Supplies (See Top 100 in Pet Supplies) #113 in Aquarium Heaters
#113 in Aquarium Heaters:
Customer Reviews: 3.9 3.9 out of 5 stars (334)
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, Aug 2
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
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 Reviewed in the United States on June 25, 2025 by Anthony J. Rienzo
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.
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Reviewed in the United States on July 1, 2024 by Paul
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
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.
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Reviewed in the United States on June 13, 2020 by Tim
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.
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
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
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