Heater Condensation Please Help

Hello, I am back with another question. I am a beginner betta owner and I have a 3 gallon tank setup with the Tetra submersible 50 watt heater that seemed to be working fine, I check the thermometer in my tank and it is always where it is supposed to be and the light comes on the heater when its not.

I just looked in my tank a few minutes ago and there is condensation inside the heater glass, I am assuming this is not good and did some research that said it is not a good sign. I unplugged the heater but now I am worried for my betta as my family keeps the house cool in the summer months.

I am very disappointed if this means my heater is already failing as I have literally had it for not even a week. Just wondering what I should do? If the consensus is that I should unplug it and that it is not safe to use I am going to try to take it back to Walmart and try to order a new one I guess. Any suggestions of a good heater for 3 gallon tank? Thanks so much for the help if you read this! Here's a picture of the heater and condensation.

 

I would return it and get a new one. I’ve had those in my tank (still do) and they work fine

 

I would return it and get a new one. I’ve had those in my tank (still do) and they work fine

Thanks for your reply! I will do that, only problem is that was the last one on the shelf so I may have to wait until there is more in stock, do you keep the whole thing submerged or just the glass portion?

 

Thanks for your reply! I will do that, only problem is that was the last one on the shelf so I may have to wait until there is more in stock, do you keep the whole thing submerged or just the glass portion?

The whole thing is submerged in my tank and try ordering it online.

 

The whole thing is submerged in my tank and try ordering it online.

Okay great, thank again!!!