this is tru.. ive tried itI found I can reduce the air pumps noise by hanging the above the tank or eswhere by a string and not touching anything the can resonate off.
I put a new "complete repair module" in my Maxima adjustable pump yesterday what a difference.
I ordered the Fusion 700 from J&L Aquatics on line yesterday for $24.95 abut $20 cheaper than any I could find in S Surrey/Langley.
YMMV ( in other words your results/milage may varie)
Mike