Mmm.. Good info, thanks. I just wanted to add in my 2 cents.. I had the MagDrive from petsmart, Model 1.5, the 140gph one, it was very quiet most of the time, if it got an air bubble trapped in it tho, it'd rattle like mad. I've got the Model 2 now, and I can't really comment on how loud it is until I put some rubber washers on it to stop it from reverberating my whole case. (bad bad bad).
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