The excellent absorption properties of carbax from juwel enduringly and quickly bind discolorations odours and toxic substances and ensure crystal clear waterr a new product from the juwel range carbax can be fitted to any existing juwel aquarium filter simply by replacing it for the old style carbon foamsr the media comes inside a media mesh in a rigid plastic box which is easily placed inside your juwel aquariumr the carbax is a granulated charcoal with excellent absorption properties to