Cobalt Aquatics Electronic Neo-Therm Pro Submersible Aquarium Heater

By Cobalt Aquatics
Rated 3.6667 out of 5 stars


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$56.95 (-24%)Chewy Price
$74.97Chewy Price
In Stock
FREE 1-3 day delivery

About This Item


  • Electronic, fully submersible aquarium heater is great for freshwater tanks, saltwater tanks, and terrariums.
  • Modern, flat design features a shatterproof case and a one-touch system that is easy to setup.
  • Advanced electronic thermostat is accurate within a plus/minus range of 0.5 degrees.
  • The LED display shows both the set temp and aquarium temp simultaneously.
  • Built-in thermal protection circuitry shuts down before it can overheat for supreme safety and reliability.

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Learn More About Cobalt Aquatics From Our Team of Experts

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Total Price: $98.93

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Fish TypeMarine Fish, Tropical FreshwaterMarine Fish, Tropical FreshwaterBetta, Cichlid, Goldfish, Marine Fish, Tropical FreshwaterMarine Fish, Tropical FreshwaterMarine Fish, Tropical Freshwater
Aquarium TypeSaltwater, FreshwaterFreshwaterSaltwater, FreshwaterSaltwater, FreshwaterSaltwater, Freshwater
MaterialPlasticPlastic, PolypropylenePlasticPlasticPlastic

Questions & Answers

4 Customer Questions

is it plastic and glass safe to small fish and will it explode and work ifit doesn't are there returns?
Answer by ChewyJan 11, 2022
The Neotherm Pro heaters are resin based and will not fracture like normal glass heaters. They are designed to be fully submerged and should not be exposed to the air, similar to their standard Neotherm heaters. They are safe to use in glass, plastic, or acrylic tanks.

dose it go with the cobalt aqurium and will it explode is it safe for nano fish like neon tetras scarlet badis
Answer by ChewyJan 06, 2022
This heater features a built-in thermal protection circuit that shuts down the heater before it can overheat, and the shatterproof casing is virtually indestructible. This is designed for any freshwater, marine, and reef tanks and terrariums.

What watt would be best for 75 gallon salt water
Answer by ChewyMar 09, 2023
A 75-gallon tank would need 150 to 450 watts.

Will this heater be able to stand up to an Oscar?
Answer by ChewyJan 23, 2023
This heater will be able to stand up to an Oscar.

ReviewsWrite a Review

Rated 3.6667 out of 5 stars
24 Ratings
Would recommend to a friend

24 Customer Reviews

Rated 2 out of 5 stars
By Kendra on Nov 26, 2023

Very Inconsistent

This is a review for the 50w. This is probably my least favorite heater I've tried, including a no-name cheap glass heater. TL;DR - it didn't fry my fish or steal my car, but it can't hold a temp. I've used it in 3 different circumstances - 5 gal glass tank planted and occupied, 3 gal of water in a 5gal bucket, and a 3 gal acrylic quarantine tank. The temp varies by a ridiculous 4-5 degrees, leaning towards the cool side. I set it to 80 and it'll average about 77, but sometimes I'll spot it at 81. My tanks in the same room with other heaters do not have this problem. It does *kind of* work, so I guess if you need something that gives you an approximate temp and doesn't explode, this is for you. But seriously, just get something cheaper.

Rated 5 out of 5 stars
By 2020Fishy on Nov 28, 2023


Very impressed with the durability of this heater!

Rated 2 out of 5 stars
By Corydoras on Apr 28, 2023

Good heater when it works.

I have had a 50% success rate with these heaters. Chewy graciously replaced a 200W that was stuck on a high temp. The 200W replacement works ok. I have a 75 W that works but is stuck on 74 degrees. Another 75W works but is difficult to adjust. Another issue I have with this heater model is that the suction cups to the mounting bracket fall off to easily. Not planning to buy these again. Nice concept but I expect better quality given the price.

Rated 1 out of 5 stars
By momabear on May 5, 2023

not Happy1

I don't Like this fish tank heater I read over the Instructions a few times but I can not get the temp to go up I need it set at 82 degrees.