Guys, finally got water in my new tank (build is under the link below). One of my MP40QDs is making too much noise. The other one is relatively quiet. I tried moving it around a little, twisting, up, down, sideways, still the same. Sounds like a mix of banging and high vibration noise. Quite audible. I used the spacers that came with them using the right glass thickness. Should I try a different spacer (wider or narrower) or do I call Ecotech? Thanks, guys.


