What I mean is the top off hose should be routed several inches from where the sensor is. The splash of incoming water adds bubbles.
The valid test for bubbles is leave the sensor exactly where it is and just swipe your finger across it. The sensor only detects air vs water, a few clinging bubbles can be interpreted as dry.
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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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