Hey everyone. I added a Marineland Magnum 250 to my tank yesterday to do a little water polishing. This filter is SO loud. I am running 2 rena xp3s that make absolutely zero noise. All I can hear now is this grinding noise from the 250. I checked inside the filter and it looks like it has enough water in it. And there isn't much bubbling coming from the discharge. Do you think this noise will go away after awhile? Or is something else going on that I need to be concerned about?