what external filters do people recommend ? i have all a external all pond solution one 1400ef started making a very annoying rattling noise, have taken the head off and pulled out the impeller cleaned it but noise is still there.
filter is under the tank in a wooden cupboard don't think that helps dampen the general noise down from it vibration ect..
thinking about getting a Fluval 306 External File heard they are near silent in operation, might be over kill though my tank is 120L
How old is your filter? May just need a new impeller. They may look as good as new but may just be slightly worn, hence the rattle. Had this on an Eheim, side by side the old and new impeller looked and felt identical. The old one rattled, the new one did not.