{"product_id":"marco-rock-decorative-structures","title":"Marco Rock Decorative Structures","description":"\u003cp data-end=\"686\" data-start=\"231\"\u003eThese unique Marco Rock structures combine eye-catching design with full reef-safe functionality, making them a standout addition to any saltwater aquarium. Crafted from natural Marco Rock E-400 mortar, these pieces are completely inert, meaning they won’t leach harmful substances or negatively impact water chemistry. Over time, they will naturally seed with beneficial bacteria, coralline algae, and even allow corals to encrust, blending seamlessly into your reef.\u003c\/p\u003e\n\u003cp data-end=\"686\" data-start=\"231\"\u003eNon-toxic - Triton ICP tested!\u003c\/p\u003e\n\u003cp data-end=\"929\" data-start=\"688\"\u003eThe porous structure of Marco Rock provides excellent surface area for biological filtration, helping support a healthy and stable system. 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