Noise/Rattle Fix! - AquaClear & Fluval C Series HOB Filters - Page 4 - The Planted Tank Forum
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post #46 of 54 (permalink) Old 02-10-2014, 01:20 AM
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still works

Originally Posted by Lowcountry View Post
Great fix! How long does it last?
Still working - about 5 months now
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post #47 of 54 (permalink) Old 02-19-2014, 11:25 AM
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But silicone is safe for aquarium use?
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post #48 of 54 (permalink) Old 02-19-2014, 12:05 PM
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Eheim makes an aquarium maintenance spray that is safe, and from what I can tell is just pure silicone. I use it on all o-rings and gaskets and never had a problem.

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post #49 of 54 (permalink) Old 02-19-2014, 12:57 PM
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I've tried Vaseline and only worked for a bit. One thing that will make it dead silent is when it's been running for a while, at least mine did until it won't turn on anymore. Cleaned it and started like new again, put Vaseline but not as silent as when it had some sludge in the impeller shaft. Vibration noise is just the HOB's nature.
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post #50 of 54 (permalink) Old 11-01-2014, 06:43 PM
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Sorry to raise this post from the dead again, but I have this problem still. I tried everything, teflon tape with vaseline, vaseline only, teflon only, but nothing worked. The closest I got to a quiet filter was with vaseline only, but it worked for about 30 minutes before getting noisy again.

Does anyone know what's going on? Am I just doomed with a noisy filter?
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post #51 of 54 (permalink) Old 11-01-2014, 07:14 PM
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Could some sand have gotten in there are scarred something?
The blade of the impeller
The shaft
The walls around it

Any of these would alter the path the impeller follows as it rotates. So it shifts back and forth at high speed. The impeller may be bumping into things, or the off-center rotation may be setting up a vibration that is then making something else rattle (perhaps a loose lid).
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post #52 of 54 (permalink) Old 11-01-2014, 08:46 PM
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Oh yeah, forgot to mention that it's a brand-new filter I think the shaft may be off-centered but that seems impossible to fix properly
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post #53 of 54 (permalink) Old 02-03-2015, 01:19 AM
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Hello all, i`m new here. 6 months ago i bought a fluval c4 & it started that rattle so thanks to yall i lubed the shaft up with Vaseline,its better now,but while i had it apart i noticed the shaft was really worn so i just flipped it and put it back in.I`m going to buy a new motor i guess that has a new shaft in it and lube it up before it gets used,should i also use that tape too?and will that keep the shaft from getting worn so fast? Is there any other shafts that could work without me having to buy a whole new motor too.
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post #54 of 54 (permalink) Old 02-03-2015, 03:49 AM
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Originally Posted by trackhazard View Post
People suggest using silicone lube instead of Vaseline to grease o-rings as petroleum jelly can break down certain types of rubber (like the latex used in condoms). Other than that, I believe its bio-safe. Just messy to work with

Like dissolves like.

Standard rubber o-rings are petroleum products, as is Vaseline. Like-like.

Vaseline can dissolve rubber, or turn it sticky/gooey as the outer surface breaks down. There are other effects, too, such as temporary swelling (big problem if you have a waterproof seal by an o-ring in a scuba-diving light).

Best to use silicone lube on rubber o-rings, as a result. If you have silicone or EPDM, Viton or Buna-Nitrile o-rings, petroleum jelly is the way to go, for the same reason.
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aquaclear, fluval c, impeller, noise, rattle

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