I did a media change on my Fluval 404 and can't get rid of the rattling noise it's been making since. I disconnected and reconnected it a couple of times, thinking it's some air pockets in the system. I can't tell if its a mechanical problem, like the impeller linkage, or just air pockets...and how to fix it. It was working fine until this recent change, and its only a year old.
Any ideas?
Thanks.
Any ideas?
Thanks.