Currently unavailable.
We don't know when or if this item will be back in stock.
Select delivery location

Cobalt Aquatics Neo-Therm Aquarium Heater (50w), Fully-Submersible Freshwater, Saltwater, Thermostat, Thermometer, Shatterproof

4.3 4.3 out of 5 stars 259 ratings
Currently unavailable.
We don't know when or if this item will be back in stock.
  • Super-flat design. Fully submersible, modern design for energy efficient Aquarium and terrarium heating. Includes reversible holster/bracket, which allows heater to face inward or outward. See the product images to determine the best neo-therm size for your tank.
  • Accurate, one-touch system. Simply set temperature between 66-96°f with one touch and the neo-therm electronic thermostat will maintain Tank temperature within +0.5°F. Led displays both set temp and actual temp, simultaneously.
  • Ultimate safety and reliability. Integrated thermal protection circuitry prevents heater from overheating. If you forget to turn it off, the neo-therm will automatically shut it down.
  • Virtually indestructible. Unlike cheap, glass heaters, the neo-therm is a resin/thermoplastic heater with a shatterproof outer-casing. Made in Poland and includes a 3-year warranty.
  • Manufacturer You can trust. Most manufacturers rate their heaters on the ability to raise an aquarium 2-3°f above ambient temperatures. This is unreliable and misleading, as the average home fluctuates 2-3°f or more throughout the day. Cobalt rates The neo-therm on the ability to raise a tank 11°f above ambient temperatures, so you will never have to worry about overworking the neo-therm or it keeping up!

Customer ratings by feature

Accuracy
4.2 4.2
Temperature Control
4.0 4.0
Sturdiness
3.8 3.8
Suction power
3.6 3.6
See all reviews
Add a debit or credit card to save time when you check out
Convenient and secure with 2 clicks. Add your card

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 3.25 x 2.25 x 7.75 inches; 10.88 ounces
  • Item model number ‏ : ‎ 31002
  • Date First Available ‏ : ‎ July 10, 2012
  • Manufacturer ‏ : ‎ Cobalt International Inc.
  • ASIN ‏ : ‎ B008AGWZCC
  • Customer Reviews:
    4.3 4.3 out of 5 stars 259 ratings

Product information

Feedback

Cobalt Aquatics Neo-Therm Aquarium Heater (50w), Fully-Submersible Freshwater, Saltwater, Thermostat, Thermometer, Shatterproof

Cobalt Aquatics Neo-Therm Aquarium Heater (50w), Fully-Submersible Freshwater, Saltwater, Thermostat, Thermometer, Shatterproof

Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.

Where did you see a lower price?

Fields with an asterisk * are required
/
/
/
/
Please sign in to provide feedback.

Product Description

The Cobalt Aquatics Neo-Therm fully submersible electronic heaters feature a modern, super flat design with an easy to set "one touch" Control system. The advanced electronic thermostat is accurate to 0.5° and includes a LED that displays both the set temp and tank temp simultaneously and has a set temperature range from 66° up to 96°. for ultimate safety and reliability, integrated thermal protection circuitry shut The heater down before It can overheat and its shatterproof outer casing make the neo-therms virtually indestructible. Perfect for freshwater and saltwater aquariums and terrariums. Available in 25-200 watt sizes. 3 year warranty.apex users: please be sure to plug your Neo-Therm into plug 4 or 8.

Looking for specific info?

Important information

Directions

See directions included with the unit

Compare with similar items

This Item
Cobalt Aquatics Neo-Therm Aquarium Heater (50w), Fully-Submersible Freshwater, Saltwater, Thermostat, Thermometer, Shatterproof
Cobalt Aquatics Neo-Therm Aquarium Heater (50w), Fully-Submersible Freshwater, Saltwater, Thermostat, Thermometer, Shatterproof
Recommendations
Cobalt Aquatics Neo-Glass Aquarium Heater, Made in Europe Fish Tank Heater for Freshwater or Saltwater Tanks, Turtle Tank Heater, Submersible Temperature Controller Thermostat, 300W
Cobalt Aquatics Neo-Glass Aquarium Heater, Made in Europe Fish Tank Heater for Freshwater or Saltwater Tanks, Turtle Tank Heater, Submersible Temperature Controller Thermostat, 300W
dummy
Cobalt Aquatics Neo-Glass Aquarium Heater Made in Europe Fish Tank Heater for Freshwater or Saltwater Tanks, Turtle Tank Heater, Submersible Temperature Controller Thermostat, 200W
Cobalt Aquatics Neo-Glass Aquarium Heater Made in Europe Fish Tank Heater for Freshwater or Saltwater Tanks, Turtle Tank Heater, Submersible Temperature Controller Thermostat, 200W
dummy
AQQA Aquarium Heater 200W for 45-80 Gallon Submersible Fish Tank Heater for Aquarium Betta Fish Heater Aquarium Thermostat Heater Freshwater and Saltwater (200W for 45-80 Gal)
AQQA Aquarium Heater 200W for 45-80 Gallon Submersible Fish Tank Heater for Aquarium Betta Fish Heater Aquarium Thermostat Heater Freshwater and Saltwater (200W for 45-80 Gal)
dummy
HiTauing Aquarium Heater, 50W/100W/200W/300W/500W Submersible Fish Tank Heater with Over-Temperature Protection and Automatic Power-Off When Leaving Water for Saltwater and Freshwater
HiTauing Aquarium Heater, 50W/100W/200W/300W/500W Submersible Fish Tank Heater with Over-Temperature Protection and Automatic Power-Off When Leaving Water for Saltwater and Freshwater
dummy
DaToo Small Aquarium Heater 50W Mini Fish Tank Heater 50 Watt Submersible with LED Temperature Display
DaToo Small Aquarium Heater 50W Mini Fish Tank Heater 50 Watt Submersible with LED Temperature Display
See details
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
PriceCurrently unavailable.$37.97$35.97$41.99-20% $39.99
List: $49.99		$12.29
Delivery—
Get it as soon as Thursday, May 16
Get it as soon as Thursday, May 16
Get it as soon as Thursday, May 16
Get it as soon as Thursday, May 16
Get it as soon as Thursday, May 16
Customer Ratings
4.34.3 out of 5 stars259
4.14.1 out of 5 stars48
4.14.1 out of 5 stars48
4.34.3 out of 5 stars674
4.64.6 out of 5 stars3,346
4.54.5 out of 5 stars572
Accuracy
4.2
—
—
4.1
4.3
4.3
Temperature Control
4.0
—
—
3.7
4.3
4.6
Suction power
3.6
—
—
3.1
4.3
4.5
Value for money
3.2
—
—
4.9
4.5
4.2
Sold By
—
Cheddy
Cheddy
Aqqa
LUYS
WinnerDirect

Customer reviews

4.3 out of 5 stars
4.3 out of 5
259 global ratings

Customers say

Customers like the quality, appearance and ease of use of the pet supplies. For example, they mention it's reliable, solid and holds the temperature. They appreciate the sleek, flat design and the fact that it'll fit in a small tank. That said, opinions are mixed on temperature and accuracy.

AI-generated from the text of customer reviews

99 customers mention84 positive15 negative

Customers like the quality of the pet supplies. They say it's reliable, solid, and well made. They also say it holds the temperature and will last a long time. Customers also say the heater works well and brings the temperature to a steady 76 degrees.

"...The heater unit is made of one piece and is kind of like heavy duty black plastic. I can’t see this ever breaking like a glass heater could...." Read more

"...During a month of use, the heater has kept the temperature exactly where I set it. The internal thermostat is spot on...." Read more

"...Bottom line - high quality and easy to use product and you won't be left stranded if there's a problem...." Read more

"...Based on my early observations, the Neo Therm appears to be a very well constructed and cleverly designed aquarium heater which has the type of high-..." Read more

25 customers mention22 positive3 negative

Customers like the appearance of the pet supplies. They mention it's sleek, flat, and has a low profile. Some appreciate the streamlined design and the fact that it doesn't occupy much aquarium space.

"...heater itself is not quite as long as my hand and is pretty thin/flat/low profile...." Read more

"...The design of this heater is very flat and slim: it doesn't stick out much from the back of the tank...." Read more

"...the Neo Therm appears to be a very well constructed and cleverly designed aquarium heater which has the type of high-tech sleek aesthetic that..." Read more

"I definitely like the low-profile aspect of this heater. However, there are two issues that are of concern...." Read more

22 customers mention22 positive0 negative

Customers find the pet supplies heater easy to use. They mention it's simple and easy to understand, set up, and check with a quick glance. They also say it'd be easy to place and remove.

"...It is incredibly easy to use - just press a button to select the temperature you want and two LEDs show the setting and current temp...." Read more

"...Setting the heater up is very easy to do, and its high tech look blends in nicely in my aquarium...." Read more

"...This heater makes the whole process easy and accurate. Speaking of accurate, when you set it to 76 your tank will be 76 not 72 or 80...." Read more

"...selected setting and current water temp — makes it easy to check with a quick glance...." Read more

21 customers mention21 positive0 negative

Customers like the portability of the product. They mention it's well made, fits just right in their small tank, and is a great space saver. Some say it fits in the air pump compartment of the Fluval Spec V tank with no problems.

"...The heater itself is not quite as long as my hand and is pretty thin/flat/low profile...." Read more

"...The design of this heater is very flat and slim: it doesn't stick out much from the back of the tank...." Read more

"...The heater looked very well made and was a nice compact size. The suction cups that are to hold it in place didn’t work so well...." Read more

"...The heater is very nice looking, flat and slim. The only con I can think of is that it’s about 2 degrees of...." Read more

39 customers mention17 positive22 negative

Customers are mixed about the temperature of the pet supplies. Some like that it shows the current temperature so they do not have to have a separate thermometer. They also like that the built-in LED temperature indicator is quite accurate. However, some customers say that the temperature is stuck at 76°F and that the heating capabilities are lessened.

"...until two years later when something went wrong and the temperature started to rise. I pulled out heater and the button was unresponsive...." Read more

"...It also has a thermometer on the same dial as the thermostat which tells you if the water temp is colder, hotter, or the same temp you set it at...." Read more

"...The digital display works fine, however, the heater element will not heat up...." Read more

"...My criteria were:1. It must be adjustable to a specific temperature (rather than preset to a single temperature).2...." Read more

16 customers mention11 positive5 negative

Customers are mixed about the accuracy of the pet supplies. Some mention that it's very accurate and aesthetically pleasing, while others say that it is not accurate and has only 2-degree adjustments.

"...3. It must be reasonably accurate and consistent.I got all of this and more...." Read more

"...They are built like a tank, very accurate, and aesthetically pleasing to the eye...." Read more

"...I did find that my unit's calibration is ~2 degrees off. That's the only reason why I did not give this product a 5 star rating...." Read more

"...This heater makes the whole process easy and accurate. Speaking of accurate, when you set it to 76 your tank will be 76 not 72 or 80...." Read more

10 customers mention4 positive6 negative

Customers have mixed opinions about the value of the pet supplies. Some mention that it's well worth the price, while others say that it is a little pricey.

"...These heaters are not inexpensive, however, if they turn out to be reliable and can last for more than a year or two, Neo Therm will have a winner..." Read more

"...They cost more but are well worth the price." Read more

"...I would definitely recommend this heater even though it’s a bit pricey." Read more

"...This heater is well worth the money. I have the 50W on my 10 gallon, and it's set to 78 degrees. It holds the aquarium perfectly consistently at 80...." Read more

10 customers mention0 positive10 negative

Customers are dissatisfied with the suction cups of the pet supplies. They mention that they don't work well, they don’t last, and they don t seem super tight.

"...But seriously the suction cups suck" Read more

"...heater does slide around a bit if it gets bumped, the suction cups don't seem super-tight...." Read more

"...When I received the item, it was missing a suction cup so instead of returning it to amazon, I contacted Cobalt directly, which they provided inside..." Read more

"...I called saying that the suction cups don't work well. They said that was the first time they'd heard of this complaint and they put me on hold...." Read more

The best aquarium heaters
5 Stars
The best aquarium heaters
Cobalt aquarium heaters are great and so durable. I used a smaller cobalt model until we recently upgraded my betta’s 1.5 gallon bowl to a 6.5 gallon tank and purchased this one. The heater itself is not quite as long as my hand and is pretty thin/flat/low profile. It plugs into a regular wall plug and attaches underwater to the inside of the tank with a suction cup. I hid it in the back behind some plants and a castle ornament and now you can’t even see it unless you’re looking for it. I moved some of the decor out of the way for the photo- you can see its circle dial and the top of the heater unit on the right. The black box in ththe middle is my filter. The heater unit is made of one piece and is kind of like heavy duty black plastic. I can’t see this ever breaking like a glass heater could. The thermostat can be set in 2 degree increments anywhere from 70-90 degrees. It also has a thermometer on the same dial as the thermostat which tells you if the water temp is colder, hotter, or the same temp you set it at. There is a single button on the top used to change the temperature setting in even 2 degree increments. It keeps my betta’s tank at 78 degrees no problem. It lights up to tell you when it’s heating and what the current temp is. I have another thermometer in the betta’s tank which I checked obsessively the first few weeks to make sure this heater was functioning properly. It always is. Now I’ve almost forgotten its there because it just works! It has a 3 year warrenty and it’s great that the company stands behind its products for that long. I am going to replace the unreliable glass heater in my 75 gallon tank with a larger model cobalt heater soon because I like them that much.
Hide
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

Sasha Leigh
5.0 out of 5 stars The best aquarium heaters
Reviewed in the United States on October 31, 2017
Verified Purchase
Cobalt aquarium heaters are great and so durable. I used a smaller cobalt model until we recently upgraded my betta’s 1.5 gallon bowl to a 6.5 gallon tank and purchased this one. The heater itself is not quite as long as my hand and is pretty thin/flat/low profile. It plugs into a regular wall plug and attaches underwater to the inside of the tank with a suction cup. I hid it in the back behind some plants and a castle ornament and now you can’t even see it unless you’re looking for it. I moved some of the decor out of the way for the photo- you can see its circle dial and the top of the heater unit on the right. The black box in ththe middle is my filter. The heater unit is made of one piece and is kind of like heavy duty black plastic. I can’t see this ever breaking like a glass heater could. The thermostat can be set in 2 degree increments anywhere from 70-90 degrees. It also has a thermometer on the same dial as the thermostat which tells you if the water temp is colder, hotter, or the same temp you set it at. There is a single button on the top used to change the temperature setting in even 2 degree increments. It keeps my betta’s tank at 78 degrees no problem. It lights up to tell you when it’s heating and what the current temp is. I have another thermometer in the betta’s tank which I checked obsessively the first few weeks to make sure this heater was functioning properly. It always is. Now I’ve almost forgotten its there because it just works! It has a 3 year warrenty and it’s great that the company stands behind its products for that long. I am going to replace the unreliable glass heater in my 75 gallon tank with a larger model cobalt heater soon because I like them that much.
Customer image
Sasha Leigh
5.0 out of 5 stars The best aquarium heaters
Reviewed in the United States on October 31, 2017
Cobalt aquarium heaters are great and so durable. I used a smaller cobalt model until we recently upgraded my betta’s 1.5 gallon bowl to a 6.5 gallon tank and purchased this one. The heater itself is not quite as long as my hand and is pretty thin/flat/low profile. It plugs into a regular wall plug and attaches underwater to the inside of the tank with a suction cup. I hid it in the back behind some plants and a castle ornament and now you can’t even see it unless you’re looking for it. I moved some of the decor out of the way for the photo- you can see its circle dial and the top of the heater unit on the right. The black box in ththe middle is my filter. The heater unit is made of one piece and is kind of like heavy duty black plastic. I can’t see this ever breaking like a glass heater could. The thermostat can be set in 2 degree increments anywhere from 70-90 degrees. It also has a thermometer on the same dial as the thermostat which tells you if the water temp is colder, hotter, or the same temp you set it at. There is a single button on the top used to change the temperature setting in even 2 degree increments. It keeps my betta’s tank at 78 degrees no problem. It lights up to tell you when it’s heating and what the current temp is. I have another thermometer in the betta’s tank which I checked obsessively the first few weeks to make sure this heater was functioning properly. It always is. Now I’ve almost forgotten its there because it just works! It has a 3 year warrenty and it’s great that the company stands behind its products for that long. I am going to replace the unreliable glass heater in my 75 gallon tank with a larger model cobalt heater soon because I like them that much.
Images in this review
Customer image
Customer image
4 people found this helpful
Helpful
 Report
NRK
5.0 out of 5 stars The only way to improve it would be to make it invisible
Reviewed in the United States on February 2, 2014
Verified Purchase
After carefully researching several different aquarium heaters, I decided on this one. My criteria were:

1. It must be adjustable to a specific temperature (rather than preset to a single temperature).
2. It must shut off when it reaches the set temperature (rather than be always on, like many aquarium heaters).
3. It must be reasonably accurate and consistent.

I got all of this and more. During a month of use, the heater has kept the temperature exactly where I set it. The internal thermostat is spot on. In addition, this heater tells you both the set temperature and the actual temperature of the water, if they are different.

The design of this heater is very flat and slim: it doesn't stick out much from the back of the tank. However, the 50-watt size is wider than the equivalent round heater. It is about 2" wide and 6.25" tall.

Note that this heater must be placed vertically, and cannot be in contact with any rocks or other tank decor. If you're looking for a heater that can be placed horizontally or under substrate, this one won't work for you.

I am using this heater in a 6-gallon tank. It's a little overpowered for that size of aquarium, but I went with the higher wattage so that I wouldn't risk overburdening the 25-watt model. If you've got a 1- to 5-gallon tank, then you can probably go with the 25-watt heater, which will be smaller.

In my dream universe, this heater would be tiny, and I would be able to hide it under the substrate. It takes up a lot of visual space in my jellyfish tank. That said, I'm so happy with how it works that I wouldn't trade it for another model.
19 people found this helpful
Helpful
 Report
Matt Z
5.0 out of 5 stars Hi tech heater backed by very responsive support!
Reviewed in the United States on August 28, 2018
Verified Purchase
About two years ago I purchased this Neo-Therm 50 watt heater. It is incredibly easy to use - just press a button to select the temperature you want and two LEDs show the setting and current temp. Totally waterproof, and "set and forget" accurate. Well, set and forget until two years later when something went wrong and the temperature started to rise. I pulled out heater and the button was unresponsive. I unplugged, waited a bit and plugged back in, as others suggested. All seemed OK until a couple days later when the temp started to rise again. I took it out, put in my back up heater and looked up the warranty.

The warranty was for 3 years, so I went online and entered my info, asking for help. Within an hour I had a friendly response back, saying they could help and asked for a picture of the heater and the receipt. I sent them in and almost as quickly, received another friendly response saying they would handle it from there. THE VERY SAME day I get notification that the replacement was shipped, along with another nice note saying how much they appreciate my business and "the least they can do is stand by their products." Wow - how often does that happen?

Bottom line - high quality and easy to use product and you won't be left stranded if there's a problem. These guys have a customer service down pat and me a customer for life!
8 people found this helpful
Helpful
 Report

Top reviews from other countries

Anthony Ton
5.0 out of 5 stars Incredible build well worth the price!
Reviewed in Canada on January 19, 2023
Verified Purchase
After years of use this item still holds strong and functioning! Incredible brand and build!
Report
jodie
5.0 out of 5 stars Worth it
Reviewed in Canada on February 8, 2021
Verified Purchase
Great heater, great brand - can't go wrong
Report
emjeenoms
5.0 out of 5 stars As described.
Reviewed in Canada on December 17, 2018
Verified Purchase
Very slim and discreet, dissappears against the background of the tank. Easy to install. I found the suction cups fell off easily from the heater itself. so added a a blob of plant glue to them and now they stay on.
Report
Justin
1.0 out of 5 stars Rusted from inside , almost killed my reef tank.
Reviewed in Canada on December 6, 2021
Verified Purchase
It keeps the temp a 78 solid BUT I did an ICP Lab test and I had 5000% the amount of iron and other metals in the water…guess what ? It rusted. I would need a remplacement our refund for the premium price I paid.
Report
No Regrets
5.0 out of 5 stars Solid & Compact
Reviewed in Canada on January 26, 2018
Verified Purchase
Looks good, easy to set up and use. Using it in a 6 gallon aquarium.
Report