The unique design of the powerful filter Marina Slim is compact and thin, adding elegance to your aquarium and occupying less space. Just plug and go Both the installation and maintenance are quick and easy. includes CERAMITEK filter cartridges, designed to optimize and maintain biological filtration. are equipped with 2, 3 or 4 filter cartridges. Alternation replacement cartridge, Bio-Guard in the cartridge system ensures fast planting of beneficial bacteria, ensuring adequate biological filtration necessary in a clean and healthy aquarium. can dip the engine to work well in a quieter way. Do not need priming and its height is adjustable to accommodate different water levels. The sponge prevents filter the small fish or hatchlings can be damaged.