It all comes down to hitting the frequency, it is working but you will see almost no movement until you get the frequency that produces a wave. You want to be sure it is placed on the side and aimed down the full length of the tank with a minimum of obstacles. The wave produces the flow, not the pump itself, it is based on resonance frequency and not a simple propeller produced flow.
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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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