A revolutionary and environmentally friendly new solution for Aquatlantis filters, consisting of filter cartridges that fit into a modular setup system, versatile to use and easy to maintain. B-BOX filter cartridges provide superior filtration, minimising environmental impact through the unique compostable properties of the biodegradable coating, while the inner filter material has potential for reuse as plant substrates. Compatible with all Aquatlantis filters, including the old versions, by using the proper conversion kit.