Undergravel Filter System for Fish Tank, Air-Driven Biofiltration Aquarium Filter Kit, Cut-to-Fit Under Gravel for Clear Water

Undergravel Filter System for Fish Tank, Air-Driven Biofiltration Aquarium Filter Kit, Cut-to-Fit Under Gravel for Clear WaterComplete Filter Kit: Everything to build your undergravel system. (Air pump and sands not included). Efficient Undergravel Filtration: An external air pump (not included) supplies continuous airflow that drives water circulation, pulling water downward through the substrate and filter plates to trap debris and finesdelivering clear, clean water and steady flow in fish tanks. Biofiltration & Aeration: Beneficial nitrifying microbes colonize the gravel

• Complete Filter Kit: Everything to build your undergravel system. (Air pump and sands not included).
  
• Efficient Undergravel Filtration: An external air pump (not included) supplies continuous airflow that drives water circulation, pulling water downward through the substrate and filter plates to trap debris and fines—delivering clear, clean water and steady flow in fish tanks.
  
• Biofiltration & Aeration: Beneficial nitrifying microbes colonize the gravel bed and plate surfaces to break down ammonia and nitrite. Air-driven flow oxygenates the water column, supporting active fish behavior and a stable biological cycle for a cleaner, balanced tank.
  
• Modular Plate Design: Fine 0.06" mesh helps keep sand/gravel from fall-through; sturdy base helps resist bottom cracks and holds heavy substrate, improving water circulation and biofiltration in freshwater or saltwater tanks.
  
• Easy Installation: Tool-free setup—lay plates, add substrate, attach the lift tube, and connect to an air pump (not included). The lift tube is adjustable and DIY cut-to-fit; use the included check valve to help stop backflow.