Hello All. Can anyone help with a water issue? I have a 180 litre tropical tank, with an Aqua One 1000 Canister Filter. For the last couple of weeks my water has had debris floating in it - hard to describe - kind of looks like bits of wet white tissue flying about?! First thoughts were the filter so cleaned that - no change. Changed the filters today & its the same again. Help! Does anyone have any ideas to help please?