Customizable, Powerful, and Silent Filtration for Crystal-Clear Aquariums. The Bioscape Tropic 500 external filters are designed to deliver efficient and customizable multi-stage filtration for small to medium aquariums. Combining high performance with a compact, space-saving design, these filters ensure a clean and healthy aquatic environment. Includes Black Sponge Suitable for tanks up to 60ltrs Flow rate 500lph