I saw this at home depot, it was about $20. Seemed like it might be a good investment. I think it's real purpose was to catch water heaters and washing machine leaks, but no reason it wouldn't work with an aquarium. I found a few cheaper alternatives on the web as well.
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So anyone use any sort of sensor/alarms to catch leaks? Wondering if they would go off due to high moisture.

So anyone use any sort of sensor/alarms to catch leaks? Wondering if they would go off due to high moisture.