Penn Plax Bubble Wall Diffuser 18″ SKU: PPX36 Category: Aquarium Accessories Related products Aquafx Single Fish Breeding Net Foam Insert Aquaclear 300 / 70 Aquafx 2ft Cabinet & Hood White 24×12 Assembled (Pickup or local delivery only) Aquafx 4ft Cabinet & Hood White 48×18 Assembled (Pickup or local delivery only)