Add some natural, rustic beauty to any aquarium with the Penn Plax Mushrooms on Rock Aquarium Decor - Large. This classic piece of aquarium décor is crafted of fish-safe, non-toxic resin and offers plenty of room for fish to hide and openings to swim through. * Made of non-toxic and fish-safe resin * Designed for both fresh and salt water aquariums * Accented with brown mushrooms * Brings a natural environment for your aquarium * Dimensions: 7.5L x 4W x 5.5H in.