Keep your aquarium clean and healthy with the Marineland Rite Size A Penguin Bio-Wheel Filter Cartridge. Designed for all water types, this power filter is easy to use and maintain. The filter location is internal, making it a great choice for smaller tanks. The custom bundle includes 3 cartridges, ensuring that you always have a backup on hand. The cartridge is compatible with the Marineland Penguin Bio-Wheel Power Filter, Model PA0135-06. Upgrade your filtration system with this reliable and effective cartridge today.