Marco Rock Oceanic Holey Base Rock 10–15cm | Aquarium Rock (Per lb)

Build strong, natural aquascapes with Marco Rock Oceanic Holey Base Rock, a premium, highly porous stone ideal for saltwater and freshwater aquariums. Known for its natural holes and lightweight structure, this rock provides excellent surface area for beneficial bacteria while creating dynamic, natural-looking layouts.

With 10–15cm medium-sized pieces, it’s perfect for building base structures, caves, and stable rock formations.

Why Choose Marco Rock?

• Highly porous structure promotes beneficial bacteria growth
• Natural holes and openings create caves and hiding spaces
• Lightweight compared to traditional dense rock
• Ideal for base structures and aquascaping layouts
• Clean, natural look for saltwater and freshwater tanks

Perfect For

• Saltwater aquariums and reef setups
• Cichlid tanks
• Freshwater aquascaping
• Biological filtration and base rock structures

Stone Details

• Type: Oceanic Holey Base Rock (Marco Rock)
• Grade: A
• Size: 10–15cm (medium pieces)
• Color: Light beige to off-white
• Texture: Porous with natural holes and cavities
• Water safe: Yes
• Preparation: Rinse before use

Available Sizes

Sold per lb:
• 1 lb, 5 lb, 10 lb, 25 lb, 50 lb

Each order includes a mix of shapes and sizes within the 10–15cm range.

🔥 Best Value: The 50 lb box offers the lowest cost per pound and is ideal for building full tank structures.

Custom Requests

Looking for larger pieces or specific shapes for your layout? Send us a message and we’ll do our best to help.

Shipping & Natural Variation

Each piece is natural and unique. Shape, size, and structure will vary slightly from order to order.