Purified Sponge Filter 3in1 Fish Tank Filter Small Bio Tank Filter with Biochemical Cotton & Multiple Filtering Layers Plastic Betta Filter with Powerful Suction Cup Compact, effective filtration designed for small aquariums and betta tanks. This 3in1 sponge filter combines multiple filtering layers—sponge, biochemical cotton, and plastic housing—to deliver mechanical, biological, and chemical filtration in one easytoinstall unit. It stabilizes water quality, traps debris, and provides a safe, gentle flow suitable for delicate fish and small aquatic environments. Key benefits Complete 3in1 filtration: mechanical (sponge) removes particles, biochemical cotton provides chemical polishing, and the sponge surface fosters beneficial bacteria for biological filtration. Safe for small and delicate species: gentle flow and soft sponge surfaces protect bettas, fry, shrimp, and other small aquatic animals. Easy to install and secure: powerful suction cup holds the unit in place on the aquarium glass for stable operation. Simple maintenance: sponge and biochemical cotton are easy to remove, rinse, or without complicated disassembly. Improves water clarity and stability: multiple layers trap debris and support nitrifying bacteria to help maintain more stable water conditions between water changes. Product attributes Functionality: Threestage filtration—mechanical, biological, and chemical—in a single compact unit. Compatibility: Designed for small aquariums, betta tanks, nano tanks, shrimp and fry tanks, desktop tanks and quarantine setups. Size: Compact and spaceefficient for small tanks; fits unobtrusively inside lowvolume aquaria. Material: Durable plastic housing with a soft sponge element and replaceable biochemical cotton layer. Performance: Multilayer filtration captures debris, polishes water, and provides surfaces for beneficial bacteria; lowflow output suitable for species that prefer calm water. Mounting: Strong suction cup attachment for secure placement on aquarium glass. How it solves common problems Reduces cloudy water and visible debris by capturing particles in the sponge and cotton layers. Supports a stable biological filter by offering a surfacearea sponge for nitrifying bacteria to colonize, helping reduce ammonia and nitrite spikes. Prevents stress and damage to delicate fish and invertebrates by producing a low, gentle current compared with many power filters. Typical use cases Betta aquarium: Provide gentle filtration and a safe place for bettas to rest without strong currents or intake injuries. Shrimp and fry tanks: Protect small and delicate inhabitants from being sucked into intake while maintaining water quality and surface area for beneficial bacteria. Quarantine or hospital tanks and desktop aquaria: Compact, unobtrusive filtration that fits small setups used for temporary care or office display tanks. Installation and maintenance Installation: Attach the filter to the inside aquarium glass with the suction cup, position at a gentle flow level and ensure the sponge media is fully submerged. Routine care: Rinse the sponge under aquarium water (not tap water) during regular maintenance to preserve beneficial bacteria. or rinse biochemical cotton as needed when it becomes discolored or clogged. Replacement parts: Sponge and biochemical cotton are removable and can be replaced individually to extend the life of the unit. What to expect in daily use Quiet, lowprofile operation that maintains water clarity without strong currents. Visible reduction of floating particles and trapped debris within the sponge and cotton layers. Gradual establishment of beneficial bacteria on the sponge surface for steady biological filtration. This compact Purified Sponge Filter 3in1 unit provides a practical, lowmaintenance filtration solution tailored for small aquariums and sensitive species. Its layered design, durable materials, and reliable suction mounting deliver balanced filtration with minimal disturbance to aquatic life.