The excellent absorption properties of Carbax from Juwel enduringly and quickly bind discolorations, odours and toxic substances and ensure crystal-clear water. 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 foams. The media comes inside a media mesh in a rigid plastic box which is easily placed inside your Juwel Aquarium. The Carbax is a granulated charcoal with excellent absorption properties to remove toxic substances, odours and colour from the water. It is recommended that this product is replaced every 2 months. This size is suitable for the following aquariums: Rio 400 Trigon 350 Vision 450