Use one or more AQ2 Aquarium Dividers to create separate compartments in your aquarium while maintaining overall heat circulation and unobstructed filtration. For easy assembly, each AQ2 includes: one divider screen, two side rails, two finishing strips and two clips. Isolated Compartments Provide Safety for injured or very young fish An exclusive breeding area Secluded quarters for aggressive fish 11 3/8 x 11 1/4, fits most 15/20L-Gallon Aquariums

• Divider size: 12-inch by 18-inch
• Fits most 29/55-gallon aquariums
• Maintains overall heat circulation and unobstructed filtration