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NATURAL REEF STRUCTURES — Create stunning aquascapes with naturally weathered reef rock, ideal for building caves, arches and rock formations in marine and cichlid aquariums. SAFE & CLEAN — Dry reef rock is free from nuisance algae, pests and unwanted hitchhikers, providing a clean foundation for new aquarium setups. IDEAL FOR MARINE & CICHLIDS — Suitable for reef aquariums, marine fish systems and hard water freshwater habitats including African Cichlid tanks. SUPPORTS BENEFICIAL BACTERIA — Highly porous surfaces provide extensive area for bacterial colonisation, supporting biological filtration and aquarium stability. BUILD WITH CONFIDENCE — Supplied as a 20kg box of 9-12cm pieces that can be stacked, arranged and bonded together to create custom aquascapes.