Condensation/burn Marks On New Aqueon Heater

Yoda

I just noticed a little condensation in/long, noticeable burn marks on my 3 week old 100-watt Aqueon heater.

Should I be concerned? The package says that you're supposed to wait 30 minutes after powering off to lift it out of the water. I have moved my setup around a few times and have waited maybe 5-10 minutes to lift it out (because it wasn't hot or even warm to the touch).

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I also just noticed condensation forming in my 5 week old 150-watt Aqueon heater in my other tank. BTW I have had both heaters set up both horizontally and vertically at times.

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I was thinking about being safe than sorry and purchasing a new heater (a 50-watt because I downsized from a 10 gallon to a 5 gallon tank). I could use the sketchy burnt heater as an emergency spare for a few hours in case a heater failed? (Side note: is a 100-watt too powerful for a 5 gallon). I'm worried that a heater explosion could easily crack/blow out the thin glass on a 5 gallon (2mm glass!).

I know these heaters have auto shut off in case of overheating or whatever, but, still, would you be worried? I read one guy say that he has never had a heater NOT accumulate a little condensation and he never had a problem, but I also read that others would be concerned. I couldn't find anything on the burn/stress marks.

Thanks for reading.
 

FishFish221

Have you tried rubbing the "burn marks" off because they are most likely mineral deposits and that glass melts and does not burn.

I also have some condensation and brown spots on my heater and it works well without any having any cracks or increase in condensation. (same amount for at least 4 weeks)
 

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Gekco

With all of my heaters I can just unplug them and start doing what ever I needed to. They don't crack or anything.

What I would do is take the heaters out of your tank and look around for a crack. If there is a crack then replace it. Even with condensation forming in the heater moisture is getting in somehow.
 

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