Hi All, when I do my water change tomorrow I want to clean the impeller as well as usual rinsing of sponges, first question is how easy/difficult is it to remove the impeller, do I just rinse it once it's removed? My second question is regarding the filter being switched off during water changes, I currently switch everything off and siphon off the water I want to change, I keep some of the drained water and use it to rinse the media in the 306, I re assemble the filter and reconnect but leave it switched off until I've topped the tank back up, I've always done it this way but I can't really think how long it's taken so not sure how long I've had the filter not running but I've never had any spikes in water perams so must be ok, when I do it tomorrow because I want to clean the impeller it's gonna take longer by however long this bit takes so the question is how long can the filter be not running before the BB start to die off, all advice gratefully received as always peeps.
BP
BP