You'll get used to it...as a matter of fact, when everything is off, you feel like something is missing.
Make sure the pump is fully submerged in water, if you're plumbing with PVC direct to the pump, make sure the pump sits flush at the bottom of the glass with at least 1" away from any glass nearby.
You can even put them on a soft sponge underneath the pump and remove to clean every other week or so.
You want to eliminate all vibration as much as possible which causes noises.
stan