After cleaning out the fluval 303 I filled it with water from the tank and connected it back up. Is this all the priming you need to do as I think this tapping/splashing sound I can hear coming from inside the filter might be an airlock. Does this make sense?
Also the middle section of the filter contains a few bags of charcoal. How long will these last?
Any help greatfully received
Also the middle section of the filter contains a few bags of charcoal. How long will these last?
Any help greatfully received