This item qualifies for FREE shipping to the contiguous U.S. Shipping to Alaska or Hawaii? Contact us for a custom shipping quote—we’re here to help! Make choosing the right piece easy with our WYSIWYG (What You See Is What You Get) reef rock structures. These one-of-a-kind pieces are individually photographed so the rock you see is the exact one you'll receive. Whether you're building a dramatic reef structure, creating caves and overhangs, or adding a standout centerpiece to your aquarium, these natural rocks take the guesswork out of ordering aquarium hardscape online. These reef rocks are an all-natural calcium carbonate rock with no chemicals or artificial additives. Each piece features a highly porous structure that makes it lightweight while remaining stable and architecturally sound for stacking and aquascaping. Finished in a non-painted Coralline, they provide the look of an established reef right from the start and make an excellent foundation for marine aquariums. Key Features & Benefits Natural Variation: Every piece is unique in shape, texture, and coloration. Because these are natural rocks, no two pieces are exactly alike. Handcrafted Structure: Each reef rock structure is carefully shaped by hand to create a stable, architecturally sound centerpiece for your aquarium. Marine Use: Made from natural calcium carbonate, these rocks are designed for saltwater aquariums and provide an ideal foundation for reef aquascapes. Size Specifications Approximate Dimensions: 15 x 13 x 13" (L x W x H) Browse our entire collection of WYSIWYG Showpieces Preparation & Care Inspect and remove debris: Before adding your reef rock structure to your aquarium, inspect the piece for any loose particles or debris from handling and shipping. A soft brush can be used to gently remove any excess dust from the surface. Rinse thoroughly: Rinse the reef rock structure with fresh water to remove any loose dust or sediment. Do not use soaps, cleaners, or chemicals, as these can be harmful to aquarium life. Cure before use (optional): For dry reef rock, curing before placement in an established reef aquarium is recommended. Soaking the rock in saltwater with proper circulation allows any residual organic material to break down and helps prevent potential nutrient spikes. Add it to your tank!