input on vortech pumps

[fishface]

well i just set up a vortech on my NEW 120! (another story) and so far all i can get outta it is alot of noise and seemingly not really all that much flow. i can just feel the flow at 2 feet and not much more, but the constant whirring of this just may drive me round the bend. i've tried aligning it as best i can but this is as quiet as i can get it...am i doing something wrong here?