colton it doesn't just rattle it starts running i had to tie it down to the pillar so it wouldn't fall into the water.. i gotta get some of those real big heavy air stones.. the ones i have now jus get pushed up to the surface with all the pressure.. will check it out at the lfs mate.. cheers..the pumps are known to be loud. a box with some ventilation should fix it but the rattling noise doesnt sound right.