skimmer help

[karazy]

ok, so i coudln't help but do a freshwater test of my new aqua-c urchin in my bathtub. i filled the tub upto where the water level of the sump is going to be,and plugged it in and it was really quite loud. is there a reasonwhy it would be so loud,because i've heard they are supposed to be quiet,and also if anyone else has one or maybe even a remora, how loud is yours?

oh, and the main soud is coming from the spray injector thing im pretty sure.