loud Nano Cube

[degbowl]

I have a 12 gal Nano Cube that is getting louder by the day. It is coming from the cooling fans. The filter isn't noisy just the fans. Is there anything that can be done to quiet the fans. It usually loud when they are first turned on then the seem to get a little quieter, but they still make alot of noise. Please let me know if anyone else has this problem and if they could fix it. Thanks!
Jim

[roka64]

If the fans are ols, the ball bearings are possibly wearing out. You can probably just replace those.

[richiestang_78]

Yeah sound slike the bearings are bad.