Original Medium 6-12" Rocks - 50lb Box - Real Reef

Real Reef Rock is our top choice for eco-friendly reef building, ideal for marine reef and fish-only aquariums. Each piece ranges from 6” to 12” (small-sized rocks) and is lightweight, porous, and full of natural holes and crevices, closely resembling coralline-encrusted coral skeleton rock.

Why Choose Real Reef Rock?

- Environmentally Friendly & Sustainable – Crafted from 100% natural reef-safe materials without impacting wild coral reefs.
- Pest-Free & Bio-Active – Cultivated in controlled greenhouse environments and fully cured for 12-16 weeks in saltwater for biological readiness.
- Rich in Essential Minerals – Contains 82-85% calcium carbonate, along with beneficial trace elements like magnesium, strontium, and iron.
- Handcrafted in the USA – Every rock is one-of-a-kind, shaped naturally, and infused with vibrant purple, pink, and red hues using non-toxic, water-based pigments.
- Aquarium-Ready – Made without synthetic glues or chemicals, using natural calcium-based binders to ensure a reef-safe, high-quality product.

Real Reef Rock provides a strong foundation for your aquarium, delivering both aesthetic appeal and functional benefits—without the risks of pests or hitchhikers found in wild rock.


Rock is naturally fragile, and some breakage may occur during shipping. We inspect and securely pack each box, but carrier handling is beyond our control. Shipping insurance does not cover breakage, so we cannot offer replacements.