Penn Plax Stone Replica Aquarium Decoration Realistic Granite Look with Fish Hideaway 2 Piece Set Size Large/XLarge This 2 piece set of granite stone replicas has a realistic shape in shades of grey and black. Set includes 1 large stone 4 inches high and 1 extra-large stone 5 inches high. This aquarium decoration provides visual interest for you and your fish. Holes provide a hideaway to rest or hide reducing stress and aggression. These granite stone replicas are perfect for cichlid tanks since this fish is territorial and must create their own space. These aquarium ornaments mimic what is found in an oceanic environment. Since each rock is separate from the other, you can display the stones separately or stack them on top of each other. Both stones have a flat top for stability. Made of safe durable resin, this aquarium decoration is safe for use in both freshwater and saltwater aquariums. Additional stones can be purchased separately to create even larger displays.