CSP-MAG Question

[sagaboy2]

I just got me a new Danger Den CSP-MAG 12 Volt Pump in the post today.

I filled it up with some water got it going round in a loop, but my question is.

Is it always noisesy and buzzing or might that just be trapped air and how effective it is if I slow it down a touch with the motherboard fan controller.

 

[sagaboy2]

Thanks If need be ill case it in sound proofing foam I have some spare.