[Brad S]

[quote=DragonFish71;997787]Lighting can do it. The tank's lights or even room lighting can heat up the room enough where the tank starts to warm up.

If your tank is upstairs heat does rise.

If your house/building is brick. It will retain the heat then leach it into the house.

Heaters can be bad from the box. (Need to return 2 myself) Or it can be a bit to chilly and the heater thinks it must come on.

A fan can help, make sure it's an oscillating one. That way it moves the room air, not just in one spot.


All good things to consider. I unplugged the heater yesterday and current tank temp is 79.7 degrees. No change. My building is brick and only the tank against the outside wall overheats so that sounds like a likely culprit. Maybe I need a heat shield behind the tank? A piece of sheet rock should make a pretty good shield don't you think? I could even put pictures on it. ha, ha


To answer others questions: The tank is beside the window and can't get even indirect sunlight. It's back is against the brick wall so that might be heating it up though. Sort of the same idea.

The light is only on 5 hrs total a day (last message incorrect: 2 on, 4 off, 3 on, off for night.) Still, I'll try killing the light too and see what happens.

Thanks for all the input. Much appreciated.