Dual Filtration System: This aquarium sponge filter combines mechanical and biological filtration to keep water clean and clear. The sponge traps dirt, uneaten food, and waste particles, while the included ceramic filter beads provide a large surface area for beneficial bacteria to grow. Natural Ecosystem: The porous sponge material promotes a healthy environment by supporting beneficial bacteria that help maintain water quality, benefiting the health and growth of fish and shrimp. Easy to Install and Maintain: Submersible internal foam sponge filters are simple to install—place in the tank, connect to an air pump, and it starts filtering. To refresh, remove the sponge, rinse it in old tank water, and reinsert. The included spare sponge ensures you always have a clean one on hand. Versatile Compatibility: Suitable for a range of setups from small Betta tanks to large breeding tanks. It can also be used in turtle tanks, delivering clean and oxygen-rich water. Compatible with various tank sizes and types, making it a flexible option for aquarium enthusiasts. Use scenarios: - Betta nano tanks and small community tanks that require gentle filtration. - Breeding, quarantine, or grow-out tanks needing reliable filtration and bio filtration. - Turtle tanks or mixed-species setups requiring clean, oxygen-rich water.