Hehe I posted the review of the Fluval C2 on amazon that wrote the fix for it
Nice review on amazon. Nice that other's will learn of the vaseline trick. I've read so many complaints about the AquaClears (and Fluval C's) rattling and the solution has always been to return it or remove the lid. Hopefully more people will keep them now a get to enjoy what great filters the AC's and C Series are!
A bit off topic but have you modded the AC filters at all besides adding the lube? I was planning on adding an extension bend to the intake tube if you don't mind checking out my AC thread. You seem to know a lot about ACs
Fish Shrimp tanks are like cups of coffee, one is never enough.
Wanted to share that I did this to my new AquaClear 50 that was noisy, and it made it very quiet. I also applied a very fine coating of the 100% petroleum jelly to the contact areas of the lid (anywhere it touches the body) and that helped even more. Such a simple fix. All you can hear now is the water hitting the surface.
Thanks guys for your tips.
My Aqua Clear 20 made rattling noise from the beginning. I couldn't ignore it after a few days. I tried silicone lubrication for my Arai helmet. I don't know if it is aquarium safe. I applied to the metal shaft of the impeller. Instantly the noise has gone away. But there is noise from the lid. I can take if off when I go to bed.
Newb here. Registered to reply My brand new filter was just a little noisy, but adding the lid added a lot of noise. Petroleum jelly reduced impeller reduced some noise. The lid still made things much worse. So I did a bit of experimenting and discovered that the noise was mostly coming from the back corner where the impeller is. I added some padding to both of the back corners, so that the lid doesn't sit tight on the back, but the noise is gone!