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I have my new pump i bought at manhattan reefs swap. it is really noisy, i did what the directions said, twist it, move it left, right etc. i have it set at pulse, but the vibration sound is loud in my family room. is this normal?
i had the same issue when i first got mine. You have to make sure the rubber boot on the outside is turned to the correct glass thinkness and lined up perfectly straight.
I have mine for more than year now. The rubber boot that is over the motor can be adjusted according to the thickness of the aquarium. You may need to take the boot off and move it a little. The boot is actually thicker in some parts, so try that. After you do that you can have install the two pieces on the glass. You may need to rotate the motor until the sound goes away. I will find it when you hear it.
When I first installed my Vortech it also made noise. You have to turn the flow all the way up and rotate the wet side assembly until the vibration is minimized. The noise may not go away completely it has to seat itself which may take a couple of days and a little additional tweaking.
Mine are quiet as a church mouse. I have to try and hear them. There are many things on my tank that are noiser including the air intake and discharge of the skimmer and so on.