[Winkyee]

After about 4 years of constant usage, my AquaClear 500 was starting to get a bit noisy. I went to my LFS to get a new impeller figuring it was worn and I was pleasantly pleased when the guy just gave me a new
Impeller Shaft . A pair of vice grips was the only tool needed to get the job done. It's just something to try before buying a new impeller.
I was amazed at how much wear was visible on the shaft.
Pete

 

[Sir Nathan XXI]

so it fixed it?

 

[Winkyee]

Yes , It was just like new after that, and I never did put a new impeller in.