Penn-Plax Tank Divider for 20 Gallon Tall Tanks

Instantly converts one aquarium into two! Can be set up as a breeding compartment in seconds. Provides a separate area for fry, or segregates aggressive fish from a peaceful community. Allows for complete heater circulation as well as unrestricted filtration. Fits 20 gallon High and 30 gallon Long aquariums. 11 3/8" x 15 1/2". 11.38" x 15.5"