12 Pack Filter Cartridges Compatible with EF-S Element and BF5 BETTAFLO Replacement Filter Cartridges for Top Fin EF-S Element Aquarium Filter Accessories

【Compatible models】Size 2.17 * 3.74 inches. Aquarium filter cartridges are compatible with BF5 BETTAFLO FILTER & DESKTOP AQUQRIUMS.

【Excellent Triple Filtration Performance】The filter cotton is made of cotton and activated carbon, filtering and absorbing impurities, maintaining a clean water source and a healthy growth environment for fish.

【Premium Activated Carbon】Our cartridges are packed with high-quality activated carbon to ensure your aquarium water stays clean and clear.

【Easy to replace】The element has been pre assembled, which is easy to replace, and only needs to be correctly installed on the power filters.

【Optimal Performance】To maintain the best water quality, we recommend replacing the cartridge approximately every 2-4 weeks for peak filtration efficiency.