To see product details, add this item to your cart.
FREE Returns
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns. How to return the item? - Go to your orders and start the return
- Select the return method
- Ship it!
Ships from: Amazon.com Sold by: Amazon.com
To see product details, add this item to your cart.
FREE Returns
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns. How to return the item? - Go to your orders and start the return
- Select the return method
- Ship it!
Ships from: Amazon Sold by: Amazon Warehouse
Other Sellers on Amazon
Image Unavailable
Color:
-
-
-
- To view this video download Flash Player
- 2 VIDEOS
Hydor ETH 300 In-Line External Aquarium Heater, 300w, 5/8" hose, Black
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Brand | Hydor |
Special Feature | Automatic Shut Off |
Color | Black |
Indoor/Outdoor Usage | Indoor |
Product Dimensions | 3"D x 3"W x 5"H |
|
| ||||
|
|
About this item
- Suitable for marine and tropical aquariums
- Easy to use
- High precision electronic temperature control
- For external use
- 5/8 inch hose
Customer ratings by feature
Frequently bought together
Videos for similar products
From the manufacturer
Hydor In-Line External Heater - Original ETH
First and unique external heater for aquariums with the exclusive PTC (Positive Thermal Coefficient) technology. The self-limiting PTC heating element ensures maximum safety against any risk of overheating. The exclusive technology and the high quality of the components ensures a long lasting product. Suitable for canister filters and sump tanks
Product details
- Is Discontinued By Manufacturer : No
- Product Dimensions : 4 x 4 x 12.5 inches; 1 Pounds
- Manufacturer recommended age : 1 month and up
- Item model number : T08203
- Department : Unisex-Adult
- Date First Available : June 15, 2004
- Manufacturer : Hydor USA, Inc.
- ASIN : B0002Z7VQE
- Country of Origin : USA
- Best Sellers Rank: #60,395 in Pet Supplies (See Top 100 in Pet Supplies)
- #176 in Aquarium Heaters
- Customer Reviews:
Looking for specific info?
Product Description
ETH Heaters are the first external heaters for aquariums with the exclusive PTC technology. The self-limiting PTC heating element guarantees maximum safety against any risk of overheating. Designed to be used on return lines coming from canister filters or sumps.
WARNING:
Important information
Directions
Follow Direction Listed in Manual
Legal Disclaimer
No Returns No Exchanges
To report an issue with this product or seller, click here.
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the ease of installation using the aquarium heater. They say it's easy to set up and use, and it has a nice clean look. Customers also appreciate the appearance of the product, saying it looks just like the image advertised. However, some customers dislike noise, and disagree on quality, accuracy, leaking, performance, and size.
AI-generated from the text of customer reviews
Customers find the installation of the pet supplies to be easy. They mention that it works great, is easy to use and set up, and that it reaches the desired temperature level easily.
"...When I first set up this heater, install was easy, it worked great, heated the tank well, etc. Everything I wanted out of a heater...." Read more
"...It was pretty easy to install and I’m no longer concerned about the turtles breaking the tank glass or heater. It works great...." Read more
"...line that returns filtered water back into your tank, it is a very simple process...." Read more
"...The new one was a little more difficult to hook up in the fittings didn't close as well as the old one. Had to use sealant to keep from leaking...." Read more
Customers like the appearance of the pet supplies. They say it has a nice clean look, and is very nice. Customers also say that it removes the eyesore of having a heater in the tank, and it frees them up decorating their tank.
"...Makes for a cleaner looking setup." Read more
"...It's amazing how much it freed me up decorating my tank, not having to work around and consider space around the heater...." Read more
"...Both units showed evidence of prior misuse...." Read more
"...Like not event by a tenth. Amazingly accurate and removes the eyesore of having a heater in the tank. Well worth the money...." Read more
Customers are mixed about the accuracy of the pet supplies. Some mention that it keeps the temperature pretty consistent for weeks, while others say that the replacement unit has stopped maintaining consistent temperature after 2 months in use. The temperature settings are not as accurate as the old unit, and the temperature in the tank will vary as you get further away from the unit. The unit itself does get somewhat warm.
"...clutter in their tanks, and who would like a stable, safe, and accurate heating setup.**Update** 2/28/14Still running like a champ...." Read more
"...to your desired water temperature and it switches on automatically to maintain the temperature setting...." Read more
"...June 3rd, 2013: DEADnoticed the water temp was lower than usual. looked at heater, no red light for heating...." Read more
"Been using this heater 4+ years from purchase. Easily the best heater for lifetime sakes...." Read more
Customers are mixed about the performance of the pet supplies. Some mention that it worked well, while others say that it stopped working.
"...When I first set up this heater, install was easy, it worked great, heated the tank well, etc. Everything I wanted out of a heater...." Read more
"...It works great. Set it to your desired water temperature and it switches on automatically to maintain the temperature setting...." Read more
"...not a chance. plugged it back in, no life. dead dead dead, useless dead.now to see if the manufacturer will play ball." Read more
"...Update: 2/24/2020: it's been over a year now, It's preforming flawlessly, love it!" Read more
Customers have mixed opinions about the quality of the pet supplies. Some mention that it is reliable and well-constructed, while others say that it failed in about 10 months and broke within a few months of having it.
"...not a chance. plugged it back in, no life. dead dead dead, useless dead.now to see if the manufacturer will play ball." Read more
"...I love the fact that there is nothing in the tank, the whole tank is evenly heated, and I don't have to reach into the tank to maintain the heater,..." Read more
"...They did, however, use some cheap wire on the inside and some poor components. I sent it back and got another hoping it was a fluke...." Read more
"...All fish have perished. Past my return window." Read more
Customers are mixed about the size of the pet supplies. Some mention that the inside was the perfect size to fit a PVC fitting, while others say that it is rather large and the heater is pretty massive. However, some customers also say that the aquarium is spacious and the multiple mini heaters give the fish more room.
"...So I got this heater . . . it was a snap to install and it perfectly fit my 5/8" ID tubing...." Read more
"...Since it's also pretty fat (much thicker than the hoses themselves), the tank now sits a few inches from the wall instead of almost right up against..." Read more
"...It fit perfectly with my Fluval 207 canister filter because I also purchased two additional Fluval A20016 rubber hose adapters..." Read more
"...Luckily no fish lost, but had to put the unsightly, space hogging, but tried and true, reliable old heater back inside the tank...." Read more
Customers are mixed about the leaking of the pet supplies. Some mention that it works nice, doesn't leak, and keeps their 20 gallon at a constant temp, while others say that it started to leak after about 4 months, and the tank had a crack in it.
"...overall, i'll take it. i'm satisfied now that it's connected and not leaking. i was irritated while i installed...." Read more
"...broke I figured out that my tank had a crack in it, and water had leaked out the back/bottom of the tank down the return water tube and into the..." Read more
"...NO leaks, easy peasy!..." Read more
"...Otherwise, it leaks." Read more
Customers are dissatisfied with the noise produced by the pet supplies. Some mention that it makes a clicking noise when it turns on, and some customers report that the heater starts clicking on and off very quickly.
"...The heater does click when it turns on, even literally at the foot of my bed its not loud enough to be disturbing once you know what the noise..." Read more
"...But tonight the wife heard this strange clicking sound. It was the heater clicking on and off very quickly. The tank as at 75f...." Read more
"...It does make a click noise when the heater turns on and off, but I'm pretty sure most do...." Read more
"...It's not ridiculously loud, but it is something I can hear from across the room, and for a while I thought something was wrong with my aquarium..." Read more
Reviews with images
-
Top reviews
Top reviews from the United States
There was a problem filtering reviews right now. Please try again later.
Pros: Ok, So this product represents an amazing idea. I love the fact that there is nothing in the tank, the whole tank is evenly heated, and I don't have to reach into the tank to maintain the heater, or change the settings. When I first set up this heater, install was easy, it worked great, heated the tank well, etc. Everything I wanted out of a heater.
Cons: The temp dial on my unit doesn't seem to work. I orrigionally heated the tank to 90 degrees (before I put fish in it, on day one of cycling) then I did fine adjustments till it was a the right temp. the knob was at the lowest setting (in the 60-70 degree range) and my temp was still at 80+ degrees. The major problem happened when I cleaned my canister filter. I unplugged everything, cleaned the filter, reassembled and plugged back in, after that the heater would no longer turn on (red light didn't light up, no matter where I put the dial, it hovers around 80 degrees.) My thought is, it has been 90+ degrees air temp in my town for the last few weeks and that is why my temp is still where it should be, because it is around 80 degrees in my house. My worry is that when it cools off, so will my tank.
I contacted customer service phone number in the manual to get a warranty replacement or repair, the phone line directed me to contact them via E-mail (I guess they don't do phone customer service???)
As instructed by the phone message, I sent an e-mail to their customer service e-mail regarding the issues I've been having... I waited a day or two, and got back this e-mail as a response:
"Subject: Hydor USA Customer Service is out of the office.
I will be out of the office starting 07/23/2013 and will not return until 07/25/2013.
Hydor USA Customer Service is out of the office . We will respond to your email upon our return. Emails will be answered in the order that they are received.
Please keep in mind that there maybe some delay in a reply due to the backlog of requests.
Have a nice day.
Thank you.
Hydor USA, Inc.
Customer Service"
Still waiting to hear about a replacement. I will update this review if and when I hear from customer support.
**UPDATE 12/11/13**
I never did hear back from customer service, however... Amazon is AMAZING, and ended up helping me out.
I found the cause of the problems with my heater to in fact be my tank, and not the heater at all. Shortly after my heater broke I figured out that my tank had a crack in it, and water had leaked out the back/bottom of the tank down the return water tube and into the heater...
I have since fixed my tank and gotten a new Hydor In-Line Heater and it has been working like a champ. Due to the issues I had in the past with heating, I decided to pair my heater with a Finnex Max-300 Digital Aquarium Heater Controller. This setup has been working GREAT! My tank temp never fluctuates. I highly recommend this setup to anybody looking to get rid of clutter in their tanks, and who would like a stable, safe, and accurate heating setup.
**Update** 2/28/14
Still running like a champ. I changed to a 5 stars from a 3 because this heater has been amazing. Combined with the Finnex Max-300 Digital Aquarium Heater Controller, this heater has kept my tank at an absolute steady temp. If your on the fence about this heater, I would say, get it. :)
NO HARDWARE. no clamps, seals, hoses, hangers, nothing. also important to note, this is for the 5/8'' THIN HOSE. the heavy duty 5/8 will not fit in the cheap plastic nuts on eat end. the thin hose has trouble squeezing in as well. i had to add metal hose clamps and zip ties b/c i was so uncertain about the hoses popping off.
thermostat and heating work fine for me. 75 gallon tank (200W is low but i have another heater that assists). room temp is 70 degrees and desired water temp is 78. i have no problems maintaining 78 with thermostat set to 78. this heater rarely comes on and when it does it doesn't stay on long at all. this is the beauty of an inline heater rather than a tube heater that's more zone-based and will run much harder.
overall, i'll take it. i'm satisfied now that it's connected and not leaking. i was irritated while i installed. if Hydor put as much time into better connectors and hardware as they put into constantly "recommending you check for leaks" in their instruction manual, it probably wouldn't have been as problematic. i couldn't help but think they must be well-aware of how easy it leaks without proper hardware that they don't ship with it.
good heater though, for now. just be prepared to bring your own supplies to make sure it doesn't leak.
will update if anything changes.
==========================
UPDATED review almost 2 months to the day. June 3rd, 2013: DEAD
noticed the water temp was lower than usual. looked at heater, no red light for heating. turned the temp up to hear the thermostat "click" and red light come on... no dice.
unplugged it for 10 minutes hoping it may just needed a reset? not a chance. plugged it back in, no life. dead dead dead, useless dead.
now to see if the manufacturer will play ball.
Top reviews from other countries
Works great, I put this online on my 75gal tank and set it for 78F and within 24 hours it’s reached that temperature and is holding steady. I love that it’s in line and it’s one less thing inside my aquarium which was a huge plus for me as I wanted a minimum amount of gear inside the tank.
清水魚から普通メダカ 冬 問題なし。
楽です。