The 6101 has no alarm. It just stops if something is wrong. Send it in, I don't need a receipt, I can go by the manufacture date and the 6101 has only been available for 9 months.
Tunze USA
305 Victor St
Austin TX 78753
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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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