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Large Pond Kits

Large DIY Backyard Pond Kits & Koi Pond Kits

Transform your outdoor space into a stunning water garden retreat with our Large Backyard Pond Kits — thoughtfully curated for homeowners, landscapers, and DIY enthusiasts alike. At Underwater Warehouse, we carry a wide selection of premium backyard pond kits and koi pond kits that simplify pond installation while delivering superior performance and long-lasting beauty.

Our large pond kits make it easier than ever to build expansive water features that become the centerpiece of your landscape. Each kit includes the essential components — rugged pond liners, high-flow pumps, skimmers, biological filters, and all plumbing and hardware — so you have everything you need in one package. With these complete systems, you can eliminate guesswork, reduce installation time, and enjoy a healthier, clearer pond ecosystem from day one.

Whether you’re designing a decorative backyard pond, installing a thriving koi habitat, or tackling a more ambitious DIY project, our DIY backyard pond kits offer flexibility and quality you can trust. From robust liners that resist wear and UV damage to energy-efficient pumps and effective filtration components, these kits are engineered for performance and ease of use.

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Koi Pond Supplies & Water Garden Equipment

Underwater Warehouse is your ultimate destination for koi pond supplies and equipment. We offer everything you need to create, maintain, and enhance stunning water features and backyard water gardens. Whether you're a seasoned pond enthusiast or just starting, our wide selection of koi pond filters, pumps, liners, water treatments, and more ensures your water feature stays beautiful. Get all your pond essentials shipped conveniently throughout the United States.

Pond Supplies, Kits, & Lighting

Discover everything you need for your koi pond or water garden at Underwater Warehouse. Our collection features essential pond supplies, including convenient pond kits for new setups or upgrades. Illuminate your water features with our variety of pond lighting options, transforming your backyard into a stunning focal point.

Water Garden Supplies

Create a peaceful water garden oasis in your backyard with Underwater Warehouse. We offer a full array of water garden supplies, including external and submersible pumps, and essential water treatments. Our products help maintain a healthy, thriving natural ecosystem, ensuring your water feature stays beautiful all year long.

Water Features and Fountains

Elevate your backyard with our stunning selection of water features and fountains. Whether you're seeking a small, decorative fountain or a grander water feature to complement your koi pond or lake, we offer a wide variety of styles and sizes. Our beautiful and functional pieces help you create a serene and inviting outdoor oasis.

Our Partners

Lighting World WarehousePond WarehouseAll Alliance LightingThe Pond & Rock Shop