PondBuilder Crystal 4000 GPH Pond Kit 20 x 25 Ft EPDM Liner | Custom water feature kit, 20″ waterfall, 7″ skimmer, Aqua Pulse pump, all hardware included

From the brand

Your Pond Project Starts Here

From building new ponds to maintaining existing ones, HALF OFF PONDS has the kits, pumps, filters, and aerators you need.

Your Backyard Pond Experts

HALF OFF PONDS is a U.S.-based, family-owned brand offering high-quality pond kits, pumps, liners, and filtration. From koi ponds to waterfalls, we make it easy to build and maintain beautiful, low-maintenance water features. Whether you’re starting fresh or upgrading your backyard, our trusted products and expert support make it easy to turn your backyard vision into reality.

Build Your Backyard Oasis

Complete Backyard Pond Kits

All-in-one kits with liner, pump, and plumbing, build your own koi pond or waterfall with ease and confidence.

Floating Pond Fountains

Add movement, beauty, and aeration to your pond with our energy-efficient floating fountains, built to impress.

Submersible Pond Pumps

Premium Koi Fish Food

Boost koi color, growth, and health year-round with floating pellets in Show & Grow, Grow Pro, and All Seasons formulas.

Simply Clear Filtration

Powerful multi-stage filtration with UV for clear, healthy water, engineered for performance and reliability.

Pond Water Treatments

Pond-Free Waterfall Kits

Enjoy the beauty of cascading water without the upkeep. Easy-to-install kits blend into any landscape naturally.

Durable Pond Liner

Tear-resistant, flexible liner built for long-lasting performance in any pond environment. Easy to shape and install.

Deep Water Aeration Power

Boost oxygen circulation and clarity with energy-efficient, bottom-diffused aeration built for lasting performance.

What makes HALF OFF PONDS unique?

We focus on delivering high-performance pond equipment at competitive prices. From aerators to full pond kits, each product is carefully selected to offer reliability, efficiency, and ease of installation for pond owners of all levels.

Are your pond kits beginner-friendly?

Yes! Our kits include everything you need with clear instructions, so anyone can build a pond or waterfall.

Do you have products for all pond sizes?

From small koi ponds to large fountains, we offer solutions for every scale—pumps, filters, aerators, and more.

Build Your Dream Pond – 20′ x 25′ Pond Kit can build a 16′ x 21′ 3,700-gallon water garden or fish pond at a 1.5′ depth. Finished pond length, width, and depth can be tailored to your specific requirements.
Everything You Need – PondBuilder Crystal 4000 Water Garden Kit Includes: PondBuilder Crystal 20″ Waterfall, PondBuilder Crystal 7″ Pond Skimmer, Aqua Pulse 4,000 GPH Pump, 20 ft. x 25 ft. of 45-mil EPDM LifeGuard Pond Liner, 500 sqft. of UnderGuard Geotextile Underlayment, 1-Watt Mini Bronze Spot Light, 1.5″ x 25′ Kink Free Tubing, Waterfall Foam to seal gaps between rocks – 16oz. can
Built to Last – LifeGuard Pond Liner is durable. Underlayment adds protection from rocks and punctures underneath the pond liner. Aqua Pulse pump has a highly energy efficient variable speed motor. Skimmer has leaf basket for cleaning floating debris. Waterfall has aeration tubing for added oxygenination. Pond lighting has energy efficient LED technology. Waterfall foam is used to seal gaps in rocks in the stream and waterfall.
A Kit You Can Trust – Warranties: EPDM LifeGuard Pond Liner – Limited Lifetime; Waterfall Filter and Skimmer – 5 years; 4,000 GPH Pump – 2 years; Lighting – 2 years
All installation hardware and plumbing fixtures are included. May ship in more than one box.