The propeller and magnet should pull out as one piece and a metal shaft that that spins on remains rigidly fixed in the pump. If that shaft is fused in the propeller assembly by calcium, that can cause the blinking issue.
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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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