AquaGlow Undergravel Filter Plate for 20-Gallon Tanks

Classic undergravel filter plate for 20-gallon (24" x 12") aquariums that harnesses the gravel bed as a biological filter medium. Modular slotted panels connect to cover the full tank bottom, while two uplift tubes powered by air pumps (not included) draw water through the substrate to colonize beneficial bacteria. An economical and low-maintenance solution for freshwater community tanks.