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- Cobalt Aquatics Neo-Therm Submersible Heater
Great design By CTReefer on 9/15/2014CTReefer would recommend this product to a friendHave this for my Nuvo16, fits great in the rear chamber. No issues with keeping my tank at 78degrees.
Blew up in my tank after 3 months By Daniel on 9/1/2014Daniel wouldn't recommend this product to a friendI bought a 200W heater for my 40G tank because it was supposed to be one of the best on the market after 3 months it could no longer regulate the temperature, than after about a week i woke up to a burning smell and it had cracked the casing and was burning up inside my sump, i don't know if anything has died yet but if they do i will make another post, i emailed their customer service waiting on a response.
just put in tank 4 days ago.... By Timothy on 8/28/2014Timothy would recommend this product to a friendbam! just plugged in after letting sit in cold tank for 15-20 min, per instructed, and checked back on it later in the day and has sat at 78 degrees on the dot every since plugging in. i used 2 on my tank for a back up and to help share the work load so i can increase longevity of heater. pick a few up. look modern, sleek, sexy, and feels like nice balance/weight = quality. enjoy
Nope By Everett on 8/17/2014Everett wouldn't recommend this product to a friendI would not buy one of these again. As mentioned in other reviews this heater stops working and takes out anything else its plugged into. For me it was my heater controller. it also leaked voltage into the tank.
4 heaters. product FAIL. By Subodh on 8/6/2014Subodh wouldn't recommend this product to a friendAn otherwise neat looking product; This **was** what I once thought the best heater in the market. On my 200 Gallon with a 50 Gallon sump, I've tried almost every other brand and they all eventually fail within 6 months. This one lasted a bit longer than that (about a year). Average life of the heater seems to be around 6-8 months. I've had 4 of these (200 W) explode in my sump and trip the GFCI.
Yes, I understand salt+electricity is a bad combo to begin with itself but I hate the smell/stink when these blow. They aren't cheap by any means so I might as well switch back to the glass heaters. At least they visibly get dirty and don't explode like these.
For those who're interested, these heaters all fail at the bottom plastic edge with a big crack (weird considering the top is what most people would assume to fail first) and if you're not running a GFCI + probe on your aquarium, these heaters (and most likely most all other brands) can leak serious voltage.
So Let Down By Aaron on 7/8/2014Aaron wouldn't recommend this product to a friendThe heater exploded in my sump. All the fish are dead. All the shrimp are dead. The coral looks very bad.
I have never felt so let down my a product.
like the flat design (150) By shawn on 7/2/2014shawn would recommend this product to a friendKeeps temp in my Nuvo 38 gal within 1degree of setting. Nice flat design with snap in suction mount. Working well and would recomend.
Love this heater By Lionel on 4/10/2014Lionel would recommend this product to a friendAlthough the cost is slightly higher than other models, after having 4 glass heaters fail on me within the first 6 months, there is good value with a 3 year warranty.
Also nice to have a heater that has the indicator and sleek design
So far works great By Ryan on 4/7/2014Ryan would recommend this product to a friendHave only been using it for 1 week but the product has been working as advertised. Currently using the heater to heat a tub to cook rock in m,y garage and the temp has bee really steady even in the morning when it's pretty cold.
Busted within 2 months of purchase By Kailua-Kona on 3/24/2014Kailua-Kona wouldn't recommend this product to a friendThe 200W Neo-Therm is a great product when it's working. The plastic shell busted within 2 months of service and now the heating element is dead.
I have tried to contact Cobalt customer service, but I am still waiting for a reply.
These are very solid units!! By Sean on 3/20/2014Sean would recommend this product to a friendCobalt has done a fantastic job with these heaters. I got two 200W units and am very impressed with how solid they are built. The only thing I could ask for would be better suction cups that hold them to the inside of your sump or tank.
Great product! By Luis on 2/24/2014Luis would recommend this product to a friendGreat product! My temperature used to swing +-1 degree with my old heater. Ever since I put my new neo therm heater in my swings dropped to +-0.2 degree. Very accurate, indestructible, small footprint and easy to read thermometer.
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Previously Asked Questions
by Nick James on January 16, 2014, @9:50 AM
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.
Bulk Reef Supply 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).
by Nick on April 11, 2014, @6:27 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?
Bulk Reef Supply 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).
by Sloan on February 8, 2014, @9:04 PM
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?
Bulk Reef Supply 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!
by James on February 4, 2014, @11:09 AM
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
Bulk Reef Supply 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).
by Tom Kinakin on January 20, 2014, @3:04 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.
Bulk Reef Supply 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!
by Debbie on March 31, 2014, @3:04 AM
Is there a calculator that helps you determine what sized heater I need for each of my tanks?
Bulk Reef Supply 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.
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 Size||Dimensions|
|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|
|200W||55 Gallons||10 7/8" x 2 1/8" x 4/5" Thick at Bezel|
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