BEFORE PLACING YOUR ORDER CONTACT US SO WE CAN CONFIRM AVAILABILITY AND OFFER YOU A DISCOUNT CODE. YOU MAY DO THIS VIA CHAT OR EMAIL [email protected] SEND US THE PRODUCT NAME AND WE WILL PROVIDE THE DISCOUNT CODE. WE PREFER CHAT TO GET RESPONSE.Compatible with a variety of tank sizes, you can choose our 3 different power of aquarium filter: 12W, 20W, 30W to maintain a healthy environment for your aquatic pets. 4-IN-1 multifunctional design provides efficient filtration, oxygenation, water circulation, and wave-making capabilities. With high-density biochemical cotton fillings, this filter ensures high-efficiency filtration of fish waste and food debris, improving water freshness and promoting fish survival rate. Just a gentle scrub in the fish tank will remove any stains, the durable biochemical cotton can be reused for the long term. Simply submerge the filter in your tank, attach it securely using the suction cups, and plug it in. Create a clean, healthy, and fresh environment for your lovely fishes!