Neo-Therm Submersible Heater - Cobalt Aquatics

Cobalt Aquatics Neo-Therm Submersible Heater
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Quick Overview

Cobalt Neo-Therm heaters are very unique.  They have a very low profile to fit into smaller spaces, and can be fully submerged at any angle. With its easy to set and easy to read control system, setting a heater has never been this easy.



  • Easy to set "One Touch" control

  • Advanced electronic thermostat - Accurate to ±0.5ºF

  • LED Display - shows the Set Temp and Tank Temp simultaneously

  • Set temperature range from 66ºF up to 96ºF

  • Safety features


Note: 300W model consists of two connected heating elements that measure 10 7/8" x 2 1/8" x 4/5" each.

More
  • Quick Overview

Cobalt Neo-Therm heaters are very unique.  They have a very low profile to fit into smaller spaces, and can be fully submerged at any angle. With its easy to set and easy to read control system, setting a heater has never been this easy.

  • Easy to set "One Touch" control
  • Advanced electronic thermostat - Accurate to ±0.5ºF
  • LED Display - shows the Set Temp and Tank Temp simultaneously
  • Set temperature range from 66ºF up to 96ºF
  • Safety features

Note: 300W model consists of two connected heating elements that measure 10 7/8" x 2 1/8" x 4/5" each.

Neo-Therm Submersible Heater - Cobalt Aquatics

52% Recommend this to a friend (26 of 50)

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25W Neo-Therm Submersible Heater
SKU: 207705
Preferred Reefers earn 290 points
$58.99
 
 
50W Neo-Therm Submersible Heater
SKU: 207706
Preferred Reefers earn 300 points
$60.99
 
 
75W Neo-Therm Submersible Heater
SKU: 207707
Preferred Reefers earn 315 points
$63.19
 
 
100W Neo-Therm Submersible Heater
SKU: 207708
Preferred Reefers earn 325 points
$65.49
 
 
150W Neo-Therm Submersible Heater
SKU: 207709
Preferred Reefers earn 380 points
$76.49
 
 
300W Neo-Therm Submersible Heater
SKU: 210143
Preferred Reefers earn 700 points
$140.27
 

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Product Questions

I have a 2 1/2 gallon tank for my betta.
Is the 25Watt Neo-Therm ok for me to use in my tank?
I would like to set it about 78 and hold it there.
My last heater rose the water to almost 88. Not good.
Question by: Judy on Jun 1, 2016 3:08:00 PM
Great question!
Typically 2.5-5 watts per gallon are recommended. While the 25 watt could work if left on the lowest setting and certainly can work well with safety built in it has the potential to over heat if left on too warm of a setting.
Answer by: Connor (Admin) on Jun 2, 2016 11:31:00 AM
I have a 94 gallons tank.
What kind of cobalt heater do I need, how many watts
Question by: Osvaldo Leon on Feb 7, 2016 4:20:00 PM
Great question!
You will want 2 of the 200 watt heaters for good coverage of your tank! Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Feb 10, 2016 6:13:00 PM
How many amps does the 200 watt heater pull?
Question by: Scott on Jun 4, 2016 1:22:00 PM
Great question!
We expect around 1.6 amps. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Jun 8, 2016 5:46:00 PM
Will this heater shut off if it is not all of the way in the water? When doing water changes on my solana, the area that the heater will go in will be out of the water for a few minuets
Question by: James on Feb 4, 2014 11:09:00 AM
Hi James,
It won't shut itself off (I don't know of any heater that would). You will want to unplug it before its removed from water (or if you have an aquarium controller you setup something like a feed mode to shut down your pumps, heaters, etc at the press of a button for when you do a water change).
Answer by: Bulk Reef Supply on Feb 4, 2014 11:09:00 AM
Is there a calculator that helps you determine what sized heater I need for each of my tanks?
Question by: Debbie on Mar 31, 2014 3:04:00 AM
Hey Debbie,
There isn't a calculator as each heater is a bit different, but all of the manufacturers do have recomended size aquariums for their heaters. If you look at the full details of this page there is a quick comparison chart to help you match the heater size to how big your aquarium is.
Answer by: Bulk Reef Supply on Mar 31, 2014 3:04:00 AM
I have a 10 gallon tank right now. I also have plans in the future to expand my tank size to around 20-30 gallons in the future. If I buy the 100 watt heater now and put it in my ten gallon tank with the idea of using this same heater in the future would it be complete overkill? Would putting in this high watt output heater be detrimental on the 10 gallon tank?
Question by: Sloan on Feb 8, 2014 9:04:00 PM
Hi Sloan,
Thats not a problem at all. If the heater is larger it just won't run for as long, nothing to worry about!
Answer by: Bulk Reef Supply on Feb 8, 2014 9:04:00 PM
I am in the process of setting up a 40 gallon hex reef tank, and would like to get a recommendation for a heater. I am not wanting to get the latest and greatest model. Just something reliable and not glass.

Thanks!
Question by: Nick James on Jan 16, 2014 9:50:00 AM
Hey Nick,
Most of us around here use the Neo-therm but the second most popular has to be the finnex HMO series heaters. Assuming you don't have an aquarium controller yet I would get something that has a digital thermostat as they are a lot less likely to fail (in particular in the ON position).
Answer by: Bulk Reef Supply on Jan 16, 2014 9:50:00 AM
I'm just waiting on the Apex gold to come out. I want to put an 85 gal coral frag/semi show tank together. With the Apex , can I run two cobalts in tandem or do i need a bigger heater than the biggest Cobalt Neo therm? I think its only good to 55 gallons . Plus I have the sump volume aswell do factor in.
Question by: Tom Kinakin on Jan 20, 2014 3:04:00 AM
Hey Tom,
I think they should be here this week :-) The different outlets have different amperage allotments but in general unless you are using two very large heaters your not going to run into any issues :-) Just for example, the 8amp outlet would be able to power about a total of 950watts. Should be way more then plenty for a 55g tank!
Answer by: Bulk Reef Supply on Jan 20, 2014 3:04:00 AM
Once the temperature is set, if my Apex unit cuts power to the outlet (temp gets out of range) does the heater remember the last set temp or does it reset to a default? If it is a default, what is it?
Question by: Nick on Apr 11, 2014 6:27:00 AM
Hey Nick,
The heater should remember the tem, but that said with a setup like this what you would want to do is set your heater for your desired temp (say 78 degrees) and then set your Apex as an emergency cutoff to cut the power if the temp gets too hot and it appears the heater has failed (say 79.5 degrees). That way the heater is in primary control and you will avoid constantly cutting power to and from it (which may be hard on the heater).
Answer by: Bulk Reef Supply on Apr 11, 2014 6:27:00 AM

Full Details

Owners Manual

 

Safety Features - integrated thermal protection circuitry shuts the heater down before it can overheat. Outer casing is shatterproof making the NEO-therms virtually indestructible. Use for freshwater and saltwater aquariums and terrariums.

 

Correct heater position- Vertical with heating element down, bezel, cord and button up.

  • Minimum water level - Top of the bezel.
  • For 25, 50, 75 Watt - 5.5" from bottom of the heater
  • For 100 Watt - 8.75" from bottom of the heater
  • Maximum depth of 31.5" deep at the bezel

 

Quick Compare - Cobalt Neo-Therm Submersible Aquarium Heaters

Model No.Maximum Aquarium SizeDimensions
25W 6 Gallons 6 1/2" L x 2 1/8" W x 4/5" Thick at Bezel
50W 12 Gallons 6 1/2" L x 2 1/8" W x 4/5" Thick at Bezel
75W 20 Gallons 6 1/2" L x 2 1/8" W x 4/5" Thick at Bezel
100W 29 Gallons 9 3/4" x 2 1/8" x 4/5" Thick at Bezel
150W 40 Gallons 10 7/8" x 2 1/8" x 4/5" Thick at Bezel
300W 75 Gallons 10 7/8" x 2 1/8" x 4/5" Thick at Bezel

Note: 300W model consists of two connected heating elements that measure 10 7/8" x 2 1/8" x 4/5" each.

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Reviews

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  • Accurate but dumb By Blake on 5/9/2017

    So... if you're looking for accuracy, then you'd be hard pressed to find a better heater. However, my 300w heater requires two linked units, dumb, it also uses the loudest switch this side of the Mississippi to turn on and off (per unit!), dumb, it leaches so much voltage that my Neptune apex jumps a full number (34.5-35.5) of conductivity when it switches, dumb!
  • I love this heater By Robert on 5/3/2017

    I have 3 of them all different sizes in different size tanks I haven't had any problems everybody is talking shit about the 200 watt. I cant even find a 200 watt in the neotherm model I don't know what they are talking about
  • No issues (YET) By Randall on 4/15/2017

    Been running for a few weeks now and so far all is OK.
  • Heater Stuck on High By Patrick on 3/15/2017

    Yesterday I had a very brief power outage. Later on that evening I noticed my Neo-Therm had the most right Red LED was lit. Also the tanks temperature was at 94 degrees. I immediately unplugged the heater and used a backup. I believe I was lucky based on the forums and reviews I’m seeing on line many have not caught it in time and had much more disastrous results. I have another 100 watt from them but I’m not going to use it. It’s too bad because the features, slim design and appealing look are a great selling point. But it’s not worth the risk after seeing the stories of the heaters blowing up, cracking, shocking people and burning up I can’t take the chance. One of the selling features I was sold on was that it less likely to fail in the on position. From the amount of instances online apparently that’s not true.
  • 150w By willy on 1/11/2017

    150watt working great no issues
  • Started out great.... By Adam on 4/15/2016

    So like everyone else I loved this heater for it's sleek design and ease of use. I bought my heater as a reef package with my aquarium back in May of 2014 and it's worked like a champ. Well it worked well until last week when it tried to cook my entire system. I caught it early enough that the heater didn't melt like some other people have stated. My aquarium was heated up to 92 degrees when i caught the issue and did lose some livestock. Since the issue was caught before it got well out of hand, I was able to save most of the fish and coral.

    Well, all heaters will fail at some point so it would be a good idea to invest in a external controller as a safeguard. For the price I would of expected it to work longer and not fail in the ON position. Just expected more from this brand.
  • Problem heater By sailfin777 on 3/11/2016

    many people that I know in the hobby say that the heater is prone to cracking and causing a fire. They'd have switched to the eheim model heater which are cheaper. I have removed all my cobalt heaters and replaced them with the eheim models.
  • Unreliable By Bret on 3/1/2016

    I have owned 5 of them in the past few years. Three of the five have burnt up and smoked out my fish room with the smell of melting plastic. Just not reliable.
  • works great By Ruben on 1/11/2016

    the fact that i can get this in my ac70 refugium and not in my display makes it worth it plus haven't had any issues with it
  • shocks you By james on 1/1/2016

    this heater for some reason shocks me, i use it in my mixing tank
  • Terrible heater By Snupa on 11/8/2015

    This heater like many others stated exploded in my tank and sent off a a large plume of smoke across the room that had a terrible smell. I should have known better since so many others are talking about this on other forums. I'm disappointed in cobalt that there has been no real acknowledgement of the issue. Beware! If you have especially the 200W swap it out now!
  • Dangerous and a BRS embarassment By Brendan on 10/22/2015

    I bought 4 of the 200W heaters a couple years ago and just happened to stumble upon them again on the BRS website tonight. I was shocked these things are still on the website and listed as BRS recommended! Shocked is a fitting term since 3 of the 4 heaters I bought ended up leaking so much electricity into the water within 6 months that I was getting shocked every time I put my hand in the tank. Through process of elimination and a good voltmeter, I determined that it was definitely the cobalt heaters. Couldn't throw them away fast enough and I'm pretty sure that one of them was responsible for loss of several fish in my quarantine tank during that time. I honestly don't know why BRS still sells these things and still has them listed as recommended. Stay away from them! I just consider myself lucky that no one got hurt from them. I'd give this a zero star if the website would allow it. I love BRS and so really want to encourage you guys to pull this very unsafe product!