Penn-Plax Penn Plax Tank-Divider – Large

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″.