You can also face the other issue, I have one that sometimes will not kick on resulting in the the potential of the tank not filling and pumps burning out.
I have a pet sitter that comes by on my extended trips to check up on the tanks. It cost me US15.00 per visit but is much cheaper than replacing a 150.00 pump or everything in my tank.
You suggestion sound good but I would not soley rely on this, someone should still come by and check on this every couple of days.
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