Atlantic Water Gardens
Atlantic Eco-Blox Water Matrix LG
Best modular solution for efficient underground water storage and pondless features.
The Atlantic Eco-Blox Water Matrix is a rigid, modular block designed to create efficient underground water storage reservoirs for various applications. It is ideal for pond-free water features, fountains, bog construction, and rainwater harvesting systems. This system holds significantly more water in a smaller footprint compared to traditional gravel-filled basins, saving considerable labor, time, and expense. The large unit measures 27" x 16" x 17.5" and offers a 31.5-gallon water capacity per block. Multiple Eco-Blox units interlock securely and are robust enough to support heavy loads like pavers or gravel.
$81.99
Owner Satisfaction
4.6
/ 5
Category Rank
496
/ 2527
#496 in Fountain & Pond Accessories
Price vs Category Average
-83%
Below average
Model
74234
/ Eco-Blox Atlantic item #
Who it's for
- Landscapers maximizing water storage in limited underground spaces
- DIY enthusiasts seeking quick, labor-saving reservoir assembly
- Eco-conscious homeowners prioritizing sustainable, easy-to-maintain water features
Who should skip it
- Budget-focused buyers preferring inexpensive traditional gravel reservoirs
- Novice installers intimidated by complex flow rate and sizing math
- Installers lacking experience with heavy-duty, puncture-resistant liner systems
Performance breakdown
Structural Integrity
Engineered to support over five tons of heavy landscape materials.
Storage Efficiency
Maximizes water volume while minimizing the required excavation footprint.
Assembly Simplicity
Modular panel design allows for straightforward, tool-free installation.
System Scalability
Interlocking blocks adapt easily to projects of any size or shape.
Versatility
Functions seamlessly across fountains, pondless features, and rainwater harvesting.
Material Durability
Rigid construction ensures long-term stability in demanding underground environments.
Key Specs
Model
Eco-Blox Atlantic item #74234
Dimensions
27 inches long x 16 inches wide x 17.5 inches high
Water Capacity
31.5 gallons per block
Weight Load Capacity
Can support over 5 tons of distributed load
Hole Size
1/2" x 3/4"
Assembly
One unit consists of 8 panels (4 large and 4 small)
Warranty
1 year
Features
- Rigid, modular design for creating underground water storage reservoirs
- Saves time and money compared to gravel-filled reservoirs
- Multiple blocks lock together for scalable construction
- Can support landscape items like gravel or pavers on top
- Easy to assemble unit
- Versatile use for pondless features, fountains, and rainwater harvesting
What customers say
Customers consistently praise the Eco Blox for their exceptional ease of use and modular design. Installation is reported as quick and intuitive, significantly simplifying the construction of large water features or reservoirs. Reviewers frequently highlight the high quality and structural integrity of the plastic, noting that the blocks reliably handle significant weight and pressure underground. This reliability makes them a trusted choice for professional installers and serious DIY enthusiasts seeking long term performance and maximum water storage efficiency.
Know before you buy
Eco-Blox provides a much higher water storage capacity in a smaller footprint. By creating a hollow void space, you reduce the amount of excavation required and save significant time and labor compared to hauling and cleaning large volumes of gravel.
Yes. The Eco-Blox system is engineered for durability and can support over 5 tons of distributed load, making it safe to place pavers, gravel, or decorative stone directly on top of the reservoir.
The units are designed with a modular, interlocking system. Multiple blocks snap together securely to create a stable, unified structure that can be scaled to fit the size of your specific water feature.
The blocks are straightforward to assemble. Each unit consists of eight panels—four large and four small—that lock together to form the rigid structure.
Each individual block holds 31.5 gallons of water. You can calculate your total reservoir capacity by multiplying this number by the total amount of blocks used in your design.
Yes, they are highly versatile and commonly used for rainwater harvesting, pondless water features, and fountain reservoirs where efficient underground water storage is required.
Still have a question?
Ask Hayley anything about this product before you decide.