Cobalt Heaters. How often they fail.

[Robertellis30]

I swear cobalt heaters have to be the top heater that fail. Stay away from them. Completely unreliable. I’ve literally have had 5 fail on me. But they have the best profile size for AIO tanks. Frustrating.

 

[Scorpius]

Aqualogic dual stage controller and Eheim Thermocontrol e heaters and I never looked back.

 

[jaganshi066]

I swear cobalt heaters have to be the top heater that fail. Stay away from them. Completely unreliable. I’ve literally have had 5 fail on me. But they have the best profile size for AIO tanks. Frustrating.

Why can’t any other company make small powerful heaters. I’ve been looking for too long now

 

[BostonReefer300]

Absolutely agree that cobalt heaters are the worst. I've had four fail. One of them poured so much electricity into the tank that it killed several fish and zapped me badly. Two others disintegrated after less than 6 months and leached who knows what into the tank. Luckily, the fourth just simply stopped working. Thanks for making me remember so much unpleasantness!:mad:

 

[Robertellis30]

Suck a headache. I’ve reached out to them before. All they say is leave it unplugged for 30mins. Should reset and fix the issue. Nope. Does not work!

I use ink bird set up on my main display tank!

 

[Cwentz758]

I had one that super heated my tank to 94 one day. Now I forever use an inkbird and a titanium. Agree the slim size is great..

 

[Karen00]

How is the company allowed to continue making and selling them? Those things sound deadly dangerous!!!! Shouldn't these incidents be reported to the consumer safety group?

 

[Squidward]

I've been lucky then. I bought 2 used ones. They were mainly used in my TTM Qurantine tanks. One was used in my mantis shrimp tank for nearly a year with no problem. So far so good.

 

[ClearRain]

Have to disagree, Aqueon heaters are the worst. Absolute trash. The number one item we get returned because they fail(by overheating or not heating at all). Got a cobalt Neotherm for my Evo in January, haven't had a problem yet.

 

[commanderwho]

I have a 75 watt cobalt on my waterbox cube 20 and never had an issue. But only had it for 8 months…now you got me worried lol

 

[OneSockERock]

Agreed on the draw of the form factor.

I had a 1 year old 100w Neotherm crack open on the bottom corner somehow in my tank a few years ago. Heard a boiling sound while I was feeding in the morning and saw bubbles coming from behind my rock where the heater was. Reached in like an idiot without unplugging it first, picked it up and found it was bubbling out black stuff from the cracked spot. Luckily didn't get shocked, still freaked out and did a 50% water change then put in fresh carbon.

Nothing ever happened, and ended up replacing it with the 75w model which has been going strong for nearly 3 years now. That said, I have a 75w Eheim sitting next to the tank as a replacement for when I feel like I'm done tempting fate with this current Neotherm.