Keep your aquarium pristine and your fish healthy with the Love Fish Aquarium CF2 Filter. This internal filter is designed to provide a clean and balanced aquatic environment. Featuring a 'bio wall' insert, it cultivates beneficial bacteria on its multi-layered surface to maintain water balance. Mechanical floss cartridges effectively sieve out waste particles, ensuring clarity. The included filter start tablet quickly bio-activates the filter, making it safe for your fish from the outset. Additionally, clever algae prevention spheres work to minimize unwanted green algae growth, keeping your tank looking its best. Maintenance is effortless thanks to the hinged lid, allowing for quick and easy cartridge replacement. Replacement cartridges are readily available in 1 and 3-month options. Product Summary: Love Fish CF2 internal aquarium filter, bio wall for bacteria, mechanical floss, filter start tablet, algae prevention, easy cartridge change, green, size 1.