Got the 6305 -- so far, it's too loud to be usable

[tonyespinoza]

I've got one 6305 running in my tank now and while it's moving water beautifully, the low-pitched resonance is unbearably loud for my family members. It projects throughout the house...

I opened it up and confirmed the top is on tight and nothing is caught inside. The impeller assembly does seem a little loose, but i presume this is intentional.

I noticed steve (Jar*head) posted in reply to a similar 6105 complaint that it was just a break-in period. But I'm concerned about "breaking-in" this expensive pump and only finding that it's still too loud.

I have several 6101's and they are awesomely quiet... I'm wondering if I'm going to have to try and find some old 6201's to use instead!

Any guidance appreciated. I did try the "rotate the magnet 180 degrees" trick.

 

[Harry_Fish]

What is the "rotate the magnet 180 degrees" trick?

 

[rvitko]

What size tank is it on? The magnet is incredibly strong and if you are using it on a small tank the rubber bumpons will compress to the point that the magnets are touching the glass and create a lot of reverberation noise. The magnet holder is designed for glass that is 3/4-1" thick, it is for very large tanks.

 

[Jar*Head]

Tony, the pump has 2 years warranty on it. If the noise did not go away after 3 or 4 weeks, Roger will take care of it. As for the high pitch noise, i don't notice anything with either 6105, 6205 or 6305. Like Roger mentioned, make sure the magnet are not directly on your glass. One of my pump has a little humming noise but it went away after 10 days.

 

[tonyespinoza]

The glass is 3/4" thick. It's a rimless tank measuring 60x40x20 and is about 200g.

I found that one of the rubber feet had fallen off... so yes, there was some contact with the glass -- i've insured the feet are now all in place and will run it for a few days and see if the noise level is acceptable. There are a couple different sounds -- one is the direct forced vibration sound (low pitch) from the glass contact, which is minimized, the other is the whir of the motor, particularly at pulses which sounds like a blender... Normally this would make me very happy -- it's the look on my wife's face that is my issue...

 

[Jar*Head]

Tony, that sould will definitely go away after couple weeks make sure you fix magnet and put the rubber feet back on.