Originally Posted by paytertot
The only time I've had a loud noise with mine is when I first got it and didn't prime it enough. If i remember right, i believe My instructions also told me that you shouldn't remove the impeller shaft unless it is broken. But I could be wrong. I really hope you can resolve this problem, because I've always had good experiences with fluval filters. Keep us posted!
Ok I'm sorry, I just did my research (as I should have before I opened my mouth) and found that since I have a smaller fluval, I would be the only one here who can't remove my impeller shaft, but YOU can. My apologies.