Just picked up two of these NIB for $50.00 are they noisy by nature or is there a break in period? I am replacing my #4's when I do my annual major clean up two of these should be enough for a RSM 130 right?
nope brand new still in box it's not that they are noisy it's just they are not wisper quiet I have them running in a small bucket befor they go into tank next month