Bubble Magus Curve 5 LOUD!

[OskarZi]

Cleaned out the Venturi even gave it a quick bath in vinegar, no signs that its getting any better

 

[madweazl]

Hmm, I ran the BM5 prior to the Deltec I use now and the Deltec is much louder. Your video didnt portray much of a difference in audible noise (sounded just like mine) so I believe it is working as intended and you're just sensitive to the sound the venturi makes. If that bugs you, stay away from Deltec because it's a lot louder (I measured 10db delta between on and off).

 

[OskarZi]

But, then I wonder that a friend of mine has the exact same skimmer, and its at least 1/4 of the noise mine does

 

[madweazl]

Well that is odd; different pumps or impellers?

 

[OskarZi]

he has the SP1000 and I also have this pump same impeller. Its the exact same skimmer

 

[madweazl]

Can you toss your skimmer in his sump for a bit? Maybe your sump and/or stand resonate just right and amplify the sound? Or, try running an input tube from outside the stand to silencer (probably louder)?

 

[OskarZi]

not much space in the sump, but the little that I can move it does nothing. The airline extension I tried also did not work

 

[OskarZi]

UPDATE: I talked to my lfs and they were kind enough to send me a new impeller, which should arrive Wednesday. Fingers crossed its going to be better

 

[K. Steven]

Mine is silent. Make sure the red cap on the silencer is sealed around the O-ring. If it isn't well sealed, use some silicone lubricant on the O-ring to help it seal completely. From your video, it looked like it may not have been sealed onto the O-ring.