Based on this product's specifications, here are some alternatives and similar models
Filtration Bio-Balls Tetra BB Bio-Balls 2500 ml – biological media for external aquarium filters
Summary description:
Tetra BB Bio-Balls 2500 ml are biological filter media designed for use in external aquarium filters. The spherical polymer bio-balls provide large surface area for beneficial nitrifying bacteria, supporting biological filtration to reduce ammonia and nitrite. Suitable for freshwater and marine setups, they are used to improve water quality in canister and hang-on filters and in custom filter baskets.