AC filters surprisingly louder than expected

el337

Fishlore Legend
Messages
17,133
Reaction score
3,063
Points
358
Experience
4 years
So I finally set up my 46g tank yesterday and installed both AC50 and AC70 and had them running. While I didn't expect them to be as quiet as my previous Aqueon quietflow, it's definitely a lot louder than I expected.

I even have it on the lowest flow. Is there anything else I can do to mute them just a little?
 

Dom90

Fishlore VIP
Messages
5,453
Reaction score
9
Points
223
Experience
3 years
Raise the water level a bit so the "waterfall" descent isn't as steep. I hardly hear mine... Plus this is why I only run one HOB if I did.


 

Et tu

Valued Member
Messages
350
Reaction score
3
Points
53
Experience
More than 10 years
Apply some petroleum jelly to the motor magnet and shaft. While you have the motor off apply some of the petroleum jelly to O ring. Be sure that the intake tube is inserted down into the motor chamber.Sometimes the lid is the culprit so adjust as needed. As a slime coat builds up Aquaclears will become silent. When you start it up have the flow on + and gently push down on the intake tube ,this will help expel air in the tube to quiet it down.
 
  • Thread starter
  • Thread Starter
  • #4

el337

Fishlore Legend
Messages
17,133
Reaction score
3,063
Points
358
Experience
4 years
Ah ok. Thanks for both of your advices! Will try them!
 

ccb04

Well Known Member
Messages
904
Reaction score
18
Points
113
Experience
5 years
A few things to try.....

- Leave both filters on full flow unless the current is bothering the tank inhabitants. Filters with flow control can sometimes become louder when the flow is restricted.

- Try a conditioner with a slime coat enhancer such as NovAqua+, Fish Protector, etc. to lubricate the impeller magnet and shaft. I've used Prime & Stress Coat as well. NovAqua+ & Fish Protector has a thicker viscosity. Also, once some 'slime' naturally builds up on the impeller parts, things should quiet down. You would of course want to re-apply a coating after cleaning the impeller.

- Run the filters without the lids on for at least a bit...as the lid can amplify any noise/vibrations.

- Check the impeller blades for any burrs, chips, etc. Also make sure that the impeller shaft on the filters isn't bent or loose.

- Make sure the filters are level.

- If it's the 'waterfall' effect from the outflow that is loud...raise the water level in the tank.
 
Last edited:
  • Thread starter
  • Thread Starter
  • #6

el337

Fishlore Legend
Messages
17,133
Reaction score
3,063
Points
358
Experience
4 years
Thanks! I have noticed a slight decrease in noise as the days passed. I guess it just needed some "break-in" time!
 

Jsigmo

Well Known Member
Messages
1,224
Reaction score
51
Points
83
Experience
More than 10 years
Keeping the water level higher also reduces the amount of static head on the pump inlet, and that reduces the tendency for bubbles to form and cavitation to occur at the pump impeller.

Cavitation is noisy. So that helps with one source of racket made by a lot of filters that use this sort of design.

You can also sometimes get some noise relief by wedging the tops in with some foam pieces to keep them from being able to rattle. After things get dirtier and some scale builds up, it often cures the lid rattle on its own, too.
 
Toggle Sidebar

Aquarium Calculator

Follow FishLore!





Top Bottom