Hi,
I have fitted a Fluval 403 external filter to my tank. However when it runs, the damn thing rattles like crazy. I have put this down to an airlock in the pump. I have tried laying the filter on it's side as suggested in the user manual, but this hasn't worked. Does anyone have any ideas as to how I can get rid of this. I have checked the impellor of the pump and it is clear of debris.
Many thanks
Ian
I have fitted a Fluval 403 external filter to my tank. However when it runs, the damn thing rattles like crazy. I have put this down to an airlock in the pump. I have tried laying the filter on it's side as suggested in the user manual, but this hasn't worked. Does anyone have any ideas as to how I can get rid of this. I have checked the impellor of the pump and it is clear of debris.
Many thanks
Ian