About This

• Complete Filter Kit: Includes 20 interlocking filter plates, 2 adjustable lift tube set (with fitting), 2 check valve, 2 regulator, 2 extra air stone, 2 x 39" extra airline tubing, 1 airline tee connector, and all required connectors—everything to build your undergravel system. (Please note: air pump and tank are not included and must be prepared separately.)
• 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: Includes 20 snap-fit undergravel plates (coverage up to 22.04" x 13.78"). 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, and for 20 gal aquariums we recommend a quiet 6–10W air pump for optimal flow.

Overview

• Brand : BaoZqua
• Tank Volume : 20 Gallons
• Special Feature : Undergravel Filtration
• Item Weight : 1.21 Pounds
• Specific Uses For Product : Biological Support: Create a stable under-gravel biofiltration layer., Debris Reduction: Help trap fine waste and bottom detritus., Substrate Stability: Hold gravel/sand in place for planted or scaped tanks., Tank Compatibility: Filter medium to big home aquariums (20 gal)., Water Circulation: Improve bottom-to-top water movement in aquariums. Biological Support: Create a stable under-gravel biofiltration layer., Debris Reduction: Help trap fine wa… See more
• Color : Black
• Included Components : 2 x Check Valves & 1 x Airline Tee Connector, 2 x Extra Air Stones & 2 x 39" Extra Airline Tubing, 2 x Lift Tube Sets, 2 x Regulators, 20 x Filter Plates 2 x Check Valves & 1 x Airline Tee Connector, 2 x Extra Air Stones & 2 x 39" Extra Airline Tubing, 2 x Lift Tub… See more
• UPC : 762949427798
• Number of Items : 1
• Number of Packs : 1