I just added a second mp10wES to my tank! anyways I had the first one for a couple of months and noticed when I installed the new one that it was significantly louder than the one I had already been running! It's centered and correctly installed so I'm just curious weather it needs some time to break in or something or if it might be faulty or simply just louder. Anyone noticed something like this? are some louder than others? I practically have to put my ear next to the older one to hear it's whirring on the other hand I can still hear the new one while I do this! any thoughts? thanks