Something has to be wrong with it unless it is possibly connected to a controller that is causing an issue or it is near a magnet. If you can rule those 2 out, let me know the age of it, it likely has a short causing this and we should replace it.
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Roger Vitko
Tunze USA
"He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!"
Current Tank Info: 210 gallon planted tank with Altum Angelfish
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