Penn-Plax Aqua Life Tank Divider for 15 to 20 Gallon 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 15 gallon and 20 gallon Long aquariums. 11 3/8" x 11 3/8". 11.38" x 11.38"