Foam Base 12×18 (use for 18″ wide Tanks) (PKT 10) Convenient size to fit most tanks SKU: AFB1218 Category: Aquarium Accessories Related products Carbon Insert Aquaclear 200 / 50 Carbon Insert Aquaclear 500 / 110 Foam Insert Aquaclear 200 /50 Aquafx 2ft Cabinet & Hood Black 24×12 Assembled (Pickup or local delivery only)