Based on this product's specifications, here are some alternatives and similar models
Filter Media Pack sera Biopur* 750 g biological filter media for aquariums
Summary description:
sera Biopur* 750 g is biological filter media designed for aquarium filtration systems. Supplied as a 750 g pack, it provides surface area for beneficial nitrifying bacteria to colonize, supporting biological filtration and reducing ammonia and nitrite levels. Suitable for use in internal and external filters, canisters and filter compartments to maintain water quality and a stable aquarium environment.