"By the Pound" means you are choosing the weight of your rock. 

Ex: Qty 5  is 5 Pounds of Rock, NOT 5 Rocks.

Selling individual rocks is impossible due to the fact that every rock is unique in size/shape/weight.

Real Reef Rock By The Pound (Small / Medium Mixed Sizes) – Midnight Black Edition

Brand: Real Reef Rock | Sold By: The Pound (LB) | Size Tier: Small / Medium Mix (~3" to 8" Pieces) | Compatibility: Marine Reef & Saltwater Aquariums

Custom-Weight Foundational Hardscaping in Bold Midnight Black

Order the exact amount of premium, eco-friendly rock you need to fit your footprint with Real Reef Rock By The Pound in Midnight Black (Small/Medium Mixed Sizes). Whether you are scaping a nano tank from scratch, filling gaps between primary bommies, or building an intricate negative-space structure, purchasing by the pound gives you total control over your layout and budget.

Finished in our exclusive Midnight Black, this rock brings a sleek, high-contrast gallery look to any display. The non-reflective, deep black foundation absorbs background light, creating dramatic shadows and visual depth while making the fluorescent greens, fiery reds, corals, and golden polyps of SPS, LPS, and soft corals radiate under actinic reef lighting.

Each pound is hand-selected from our small-to-medium inventory, delivering a balanced assortment of porous base pieces, textured chunks, and accent rocks averaging 3 to 8 inches in length (approx. 1 to 4 lbs per piece).

Key Features & Benefits

• Sold By The Pound for Complete Flexibility: Order as little or as much as your scape requires—perfect for custom nano builds, sump biological media, or adding new coral tiers to an existing reef.

• Hand-Picked Small/Medium Profiles: Pieces range from ~3" to 8" across, providing ideal building-block sizes for stacking, chinking base gaps, or creating stepping-stone frag mounts without overwhelming the tank.

• Modern Midnight Black Aesthetic: Pigmented with non-toxic, reef-safe mineral binders. 100% inert, non-leaching, and free of heavy metals, copper, or synthetic dyes.

• 100% Eco-Friendly & Ocean-Preserving: Handcrafted in the USA using clean calcium carbonate and natural mineral aggregates (comparable to premium calcium reactor media), preserving wild ocean reefs from destructive harvesting.

• Guaranteed 0% Pest Hitchhikers: Cultured and cured in controlled, bio-secure facilities. Enjoy mature biological rock with zero risk of introducing Aiptasia, bubble algae, parasitic flatworms, predatory crabs, or mantis shrimp.

• Exceptional Biological Porosity: Riddled with intricate micro- and macro-pores that deliver massive biological surface area to host both aerobic nitrifying and anaerobic denitrifying beneficial bacteria.

• Natural Mineral Buffering: Composed of 82–85% natural calcium carbonate plus essential trace minerals (calcium, magnesium, strontium, and iron) to help support stable alkalinity, calcium, and pH levels.

Ideal Applications

• Nano & Desktop Tank Foundations (5–25 Gallons): The 3"–8" piece size makes these rocks easy to arrange and position in tight footprints, rimless cubes, and desktop peninsulas.

• Structural Gap Filling & Anchoring: Use these pieces as foundational footers, stabilization wedges, or connecting joints between larger shelves, arches, and branch networks.

• Biological Filtration in Sumps & Refugiums: Add loose chunks into sump chambers, baffles, or media trays to drastically boost biological nitrification without trapping excessive detritus.

• Isolated Frag Islands: Perfect for creating separate, standalone islands on the sandbed to isolate fast-growing corals like Zoanthids, GSP (Green Star Polyps), or Xenia.

Aquascaping & Preparation Tips

1. Quick RO/DI Rinse: Real Reef Rock contains zero dead organic matter or foul curing die-off. Simply give your pieces a quick rinse or dunk in RO/DI water to clear any transit dust before tank placement.

2. Modular Stacking: To assemble sturdy, interlocking structures, join contact points using the "sandwich method": Rock + extra-thick cyanoacrylate gel super glue + 2-part epoxy putty + gel super glue, or lock them permanently with quick-setting hydraulic reef mortar.

3. Biological Cycling: Since the rock arrives clean and sterile, kickstart your biological filtration by seeding the tank with a quality bottled nitrifying bacteria culture alongside your preferred fishless cycling routine.

Product Specifications