The Nanjing Gingko Lake Arowana & Koi Pond Project is a representative outdoor custom-acrylic project by Leyu. It includes two independent landscape ponds, each using a different thermoformed acrylic structure.
The Koi Pond began production in early 2025 and opened in late spring. The Arowana Pond started production in late 2025, with installation and inspection completed in early 2026.
Both are outdoor pressure-bearing water features exposed to sunlight, temperature changes, wind, and rain. This places high demands on acrylic weather resistance, structural stability, and forming precision, resulting in clear, well-formed, and stable underwater landscapes.
Project Highlights: Dual Custom Thermoformed Acrylic Designs
The project features two custom-shaped thermoformed acrylic viewing structures, each designed for the specific landscape and functional requirements of the Koi Pond and Arowana Pond.
The two designs balance visual appeal with structural performance.
Koi Pond — Custom M-Shaped Thermoformed Acrylic Structure
The Koi Pond features a custom M-shaped double-curve thermoformed acrylic viewing panel.
Unlike conventional flat or single-curve acrylic, the symmetrical M-shaped curves provide smooth lines, precise geometry, and a more dimensional landscape effect.
The curved structure also expands viewing angles, allowing visitors to enjoy a fuller view of the swimming koi.
Precision temperature-controlled thermoforming ensures even stress and stable shaping, with no creases or optical distortion. The result combines outdoor structural safety with overall landscape aesthetics.
Arowana Pond — Nearly 40m Long Curved Acrylic Structure
The Arowana Pond features a nearly 40-meter-long curved thermoformed acrylic wall, making it the key challenge in both fabrication and installation.
The oversized curved structure was large enough to span the production workshop when fully formed, creating extremely high fabrication requirements.
Due to road transport and on-site lifting limitations, Leyu divided the wall into two large independent components for fabrication. Each panel was thermoformed as one piece to maintain uniform curvature, continuous lines, and consistent shaping.
After transportation to the site, the two oversized components were integrated using a high-precision molecular seamless joining process. Multiple stages of fine grinding and polishing minimized the joint visibility.
The result is a continuous, highly transparent curved viewing surface that provides an immersive view of the giant arowana swimming underwater.
Core Acrylic Process Advantages
1. Weather-Resistant Optical-Grade Acrylic for Outdoor Use
The project uses high-transparency optical-grade cast PMMA with a professional UV- and aging-resistant modified formulation.
This helps reduce yellowing, light-transmission loss, and material aging caused by prolonged sunlight and seasonal temperature changes.
With light transmittance above 92% and low optical distortion, the acrylic preserves the natural colors of aquatic life and maintains clear, transparent viewing over long-term outdoor use.
2. High-Precision Thermoforming for Stable Structures
For the Koi Pond's M-shaped double curve and the Arowana Pond's ultra-long single curve, Leyu uses zone-controlled precision thermoforming.
Heating, shaping, and cooling parameters are matched to each curve profile to release internal stress and reduce the risks of springback, whitening, and deformation.
This ensures accurate dimensions, regular curves, and stable structures for custom acrylic components.
3. Modular Seamless Joining for Reliable Pressure Resistance
For the Arowana Pond's nearly 40-meter-long acrylic wall, Leyu uses a high-standard molecular seamless joining process combined with multi-stage precision polishing.
This creates a visually seamless and structurally strong finished wall.
The completed acrylic wall can withstand long-term static water pressure while resisting outdoor thermal stress and environmental exposure, reducing risks such as leakage and deformation for stable long-term operation.
4. Standardized Quality Control Throughout the Process
Before shipment, all custom and oversized acrylic components undergo multiple quality-control stages, including acrylic casting, stress relief, precision thermoforming, double-sided polishing, and simulated water-pressure testing.
Special protection and transport plans are also developed for oversized and irregular components to reduce damage and deformation during transportation.
On site, Leyu follows standardized procedures for precision lifting, alignment, sealing, and staged water-pressure testing. Structural pressure resistance and waterproof performance are verified step by step before final acceptance and delivery.
5. High Toughness and Easy Maintenance for Public Use
Engineering-grade acrylic offers high toughness and impact resistance, making it suitable for public landscape applications in busy tourist areas.
Minor surface scratches can be repaired through on-site polishing, simplifying maintenance while extending the service life of the landscape structure and helping reduce long-term maintenance costs.
Leyu Custom Acrylic Solutions for Outdoor Landscape Projects
The Nanjing Gingko Lake Arowana & Koi Pond Project demonstrates Leyu's ability to customize acrylic structures for complex outdoor landscape applications.
Unlike standard acrylic panels, these two ponds required different curved geometries, forming processes, installation methods, and transportation solutions.
Leyu coordinated material selection, custom fabrication, thermoforming, modular joining, transportation, and on-site installation according to the requirements of each pond.
The project also highlights the advantages of thick acrylic panels in large outdoor water features, where transparency, structural stability, weather resistance, and long-term durability must work together.
For projects involving large acrylic viewing panels, curved acrylic walls, landscape ponds, aquariums, or other custom water features, Leyu provides project-specific acrylic fabrication and engineering solutions.
Thick Acrylic Panels for Large Outdoor Water Features
Thick acrylic panels are particularly important when acrylic is used in pressure-bearing water features.
For outdoor applications, material selection must consider not only transparency but also environmental exposure, structural requirements, forming accuracy, and long-term maintenance.
The Nanjing Gingko Lake project combines high-transparency cast PMMA with precision thermoforming and customized structural solutions.
For the M-shaped Koi Pond viewing structure, the focus was on precise double-curve forming and visual quality.
For the nearly 40-meter Arowana Pond wall, the focus was on oversized fabrication, modular production, seamless joining, transportation, and on-site integration.
These two different applications demonstrate how thick acrylic panels can be customized for different landscape requirements while maintaining high transparency and structural stability.
Leyu Packaging and Transportation
Oversized acrylic components require dedicated protection during transportation.
Before shipment, Leyu applies PE film to the acrylic surfaces to help protect them from scratches and surface damage during handling and transit.
Depending on the product size, shape, and transportation requirements, acrylic components can be packed in KT-board wooden crates.
If additional structural protection is required, an iron frame can also be provided according to the specific product and transportation conditions.
For oversized or irregular acrylic components, packaging and transportation are planned together with the fabrication and installation process to reduce the risk of damage and deformation.
Leyu Custom Installation, Maintenance and After-Sales Service
For large custom acrylic projects, product delivery is only one part of the overall service.
Leyu can provide customized installation support according to project requirements, covering the coordination of transportation, lifting, positioning, joining, sealing, and installation.
For projects requiring ongoing support, maintenance and after-sales services can also be arranged according to the actual application and service scope.
Minor surface scratches on acrylic can generally be restored through professional polishing, providing a practical maintenance solution for long-term public landscape use.
Through integrated fabrication, installation, maintenance, and after-sales support, Leyu aims to provide a complete service solution for custom acrylic projects.
Nanjing Gingko Lake Arowana & Koi Pond Project: A Leyu Case
The Nanjing Gingko Lake Arowana & Koi Pond Project combines two different acrylic structures within one outdoor landscape application.
The Koi Pond uses an M-shaped double-curve thermoformed acrylic viewing structure, while the Arowana Pond uses a nearly 40-meter-long curved acrylic wall assembled from two oversized components.
The project required precise thermoforming, stress control, seamless joining, polishing, transportation, lifting, installation, and pressure testing.
It demonstrates Leyu's capability in custom outdoor acrylic fabrication and the application of thick acrylic panels in large pressure-bearing landscape water features.
From material selection and custom fabrication to installation and maintenance support, Leyu provides integrated acrylic solutions for demanding architectural and landscape projects.
Conclusion
The Nanjing Gingko Lake Arowana & Koi Pond Project is a representative example of Leyu's outdoor custom acrylic engineering.
Two different pond designs required two different thermoformed acrylic solutions: an M-shaped double curve for the Koi Pond and a nearly 40-meter curved acrylic wall for the Arowana Pond.
Through high-transparency cast PMMA, precision thermoforming, modular seamless joining, standardized quality control, and professional installation, Leyu achieved a balance of visual clarity, structural stability, and outdoor durability.
With expertise in thick acrylic panels, custom fabrication, installation, maintenance, and after-sales support, Leyu continues to provide customized acrylic solutions for large aquariums, landscape water features, underwater viewing structures, and other demanding applications.
FAQ
1. What is the Nanjing Gingko Lake Arowana & Koi Pond Project?
It is a custom outdoor acrylic landscape project at Nanjing Gingko Lake Park, consisting of two independent Koi and Arowana ponds.
2. When was the Koi Pond completed?
The Koi Pond began production in early 2025 and opened in late spring.
3. When was the Arowana Pond completed?
Production began in late 2025, with installation and inspection completed in early 2026.
4. What acrylic structure is used for the Koi Pond?
The Koi Pond uses a custom M-shaped double-curve thermoformed acrylic viewing structure.
5. How long is the Arowana Pond acrylic wall?
The curved acrylic wall is nearly 40 meters long.
6. Why was the Arowana Pond wall divided into two components?
Due to road transportation and on-site lifting limitations, the oversized wall was divided into two large components for fabrication and later joined on site.
7. How were the two Arowana Pond components joined?
Leyu used a high-precision molecular seamless joining process followed by fine grinding and polishing.
8. What type of acrylic does the project use?
The project uses high-transparency optical-grade cast PMMA with UV- and aging-resistant modification.
9. How does Leyu protect acrylic during transportation?
Acrylic surfaces are protected with PE film before shipment. KT-board wooden crates can be used, while iron-frame packaging can be provided when additional protection is required.
10. Does Leyu provide installation and maintenance services?
Yes. Leyu can provide customized installation, maintenance, and after-sales support according to project requirements.
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