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I've never had a Vortech pump but I do have two of the bigger Jecod knockoffs and they are pretty quiet. Did you make sure that the two sides are lined up perfectly? That might cause some noise. They also might just need to break in a little. One of mine was noisier than the other at first but with a little tweaking it quieted down significantly.MP10qd is installed. This thing is pretty loud for having a "quiet" in the name. It seems just as loud as my old mp10s that I had years ago. I expected this pump to be much quieter as it is easily the loudest thing on my tank right now. Is there really such a thing as a break in period for these pumps?

). I swapped out the dry side and the pump is silent now. Ecotech support was excellent.
We will see what it does.