Aquascape 53037 Large Pond Kit — 21’ x 26’ Ecosystem Pond with 9-PL 7000 Solids-Handling Pump

The Aquascape 53037 Large Pond Kit provides everything you need to build a beautiful, high-capacity 21' x 26' backyard ecosystem pond. Perfect for homeowners, contractors, and pond builders, this professional-grade kit includes Aquascape’s industry-leading BioFalls® filtration, a powerful 9-PL 7000 pump, durable EPDM liner, skimmer, and all plumbing components.

This kit creates a large, clean, natural-looking pond with exceptional biological filtration and long-term reliability — ideal for koi ponds, large water gardens, and premium landscaping projects.

There’s a reason the Aquascape 9-PL Tsurumi pump has been the professional contractor’s pump of choice for large pond builds for over two decades. It doesn’t quit. It doesn’t need adjusting. It doesn’t require an app. It pumps up to 7,300 gallons per hour, handles debris solids up to 1/4 inch, and runs continuous-duty 24 hours a day in any weather. If you want a large pond that holds water cleanly and reliably for the next 15 years, the 53037 is the kit you build it with.

The Aquascape 53037 Large Pond Kit delivers everything needed to build a 21-foot by 26-foot ecosystem pond at a maximum depth of 2 feet — approximately 8,100 gallons of living, circulating, naturally balanced water. The complete system includes the Signature Series 1000 Pond Skimmer, the Signature Series 6000 BioFalls® biological filter, the 9-PL 7000 solids-handling pump, a full LED lighting package, the Automatic Dosing System, a 25’ x 30’ / 45-mil EPDM liner, and 750 sq. ft. of underlayment. Everything is pre-matched and sized to function as a unified ecosystem.

The 53037 is the straightforward, proven large-pond build. No app required, no flow-rate adjustments, no Wi-Fi pairing. The 9-PL Tsurumi pump runs at full designed capacity from day one. If you want app control and adjustable flow, see the 53063 (SLD 5000–9000 pump). If you want the maximum-feature Deluxe configuration, see the 53067. But if you want the kit that professional pond installers across the country have specified for reliable 21’ x 26’ builds for years, you’re looking at it.

Why Choose the Aquascape 53037 Large Pond Kit?

• The 9-PL Tsurumi pump is built for this exact application. Engineered by Tsurumi — Japan’s premier submersible pump manufacturer — the 9-PL is hydraulically “dialed in” to the head pressures found in Aquascape pond systems. Its horizontal design fits precisely in the Signature Series Skimmer, its semi-vortex impeller handles debris without clogging, and its continuous-duty motor runs cooler and longer than alternatives. This is not a generic pond pump dropped into a kit. It’s the pump Aquascape built the kit around.
• Signature Series 6000 BioFalls® — the biological backbone. At the scale of an 8,100-gallon ecosystem, water clarity is determined by the health and size of the biological filtration colony. The BioFalls 6000, loaded with BioBalls media and a rock tray, provides the surface area for billions of beneficial bacteria to colonize and continuously convert fish waste into harmless nitrates. The waterfall it creates adds beauty and critical aeration simultaneously.
• Complete kit. Genuinely complete. Every component — skimmer, filter, pump, liner, underlayment, plumbing, LED lights, dosing system, installation hardware, and Welcome Kit — is included. You provide rocks, gravel, water, and the excavation.
• Fixed flow means full power on day one. Unlike adjustable-flow smart pumps, the 9-PL runs at its designed output continuously. 7,300 GPH through a 21’ x 26’ ecosystem means complete turnover and powerful waterfall performance without monitoring or adjustment.
• Built for koi. The combination of BioFalls 6000 biological filtration, Signature Series 1000 mechanical skimming, and 7,300 GPH circulation creates water conditions where koi and goldfish thrive. At standard stocking rates, this system supports 10–15 koi in a well-maintained ecosystem.
• Same pond, lower price point than the 53063. The 53037 builds the identical 21’ x 26’ ecosystem. The difference is the pump: the 53037 uses the 9-PL fixed-flow pump; the 53063 uses the SLD smart adjustable pump. If app control isn’t a priority, the 53037 delivers equivalent water quality at a lower cost.

What’s Included in the Aquascape 53037 Pond Kit?

Every component below is pre-matched and sized for a 21’ x 26’ / up to 2’ deep ecosystem pond:

Signature Series 1000 Pond Skimmer with Faux Rock Lid

Surface mechanical filtration first line of defense. The Signature Series 1000 skims leaves, pollen, and surface debris before they sink and decompose, while housing and protecting the 9-PL pump from direct contact with large solids. The faux rock lid naturalizes the skimmer into the pond edge.

Signature Series 6000 BioFalls® Biological Filter with Rock Tray & BioBalls Media

The biological engine of the ecosystem. The BioFalls 6000’s extensive media surface area colonizes beneficial bacteria that convert ammonia and nitrites to harmless nitrates — the invisible process that keeps your pond water clear and your fish healthy. The included Rock Tray lets you naturalize the falls with fieldstone. The continuous overflow creates the waterfall and aerates the pond simultaneously.

Aquascape 9-PL 7000 Solids-Handling Pond Pump (Model 29977 — Tsurumi-engineered)

Up to 7,300 GPH maximum flow. 35-foot max head height. The 9-PL’s semi-vortex impeller handles debris particles up to 1/4 inch without clogging, its direct-drive continuous-duty motor runs at lower temperatures to extend pump life, and its built-in thermal overload protects against dry-run damage. Constructed of stainless steel and composite resin. Horizontal design fits precisely in the Signature Series 1000 Skimmer. 20-foot power cord. 2-year limited warranty.

Complete LED Lighting Package

(2) 3-Watt LED Waterfall Lights, (1) 1-Watt LED Waterfall and Up Light, 60-Watt Transformer with photocell, 3-Way Quick-Connect Splitter, and 25 feet of LVL Extension Cable. The photocell-equipped transformer automatically activates lights at dusk and deactivates at dawn. No timer programming required.

Automatic Dosing System for Ponds + Maintain for Ponds (32 oz.)

Set the dosing schedule once and the system automatically adds water treatments at your defined interval. The included 32 oz. of Maintain for Ponds — Aquascape’s beneficial bacteria and enzyme blend — starts your water treatment routine immediately after filling. Prevents green water, reduces sludge, and maintains biological balance with no manual intervention.

25’ x 30’, 45-mil EPDM Fish-Safe Liner + 750 sq. ft. Geotextile Underlayment

The 25’ x 30’ liner builds a 21’ x 26’ pond at up to 2’ depth with the edge overlap required for proper anchoring and finishing. 45-mil EPDM is the industry standard for ecosystem ponds: UV-resistant, fish-safe, and rated for 20+ years. The 750 sq. ft. geotextile underlayment cushions the liner against rocks and roots in the soil beneath.

2" x 50’ Flexible PVC Pipe

Connects the skimmer pump outlet to the BioFalls filter inlet. Flexible construction accommodates bends in your pond layout without rigid fittings or flow restriction.

Check Valve Assembly

Prevents backflow through the pump discharge line when the system is powered off, protecting the plumbing and preventing stream flooding on startup.

Installation Kit

Silicone sealant, EPDM liner patch, pond and waterfall foam sealant, PVC cement, and all necessary fittings for a complete, leak-resistant assembly.

Welcome Kit

Introductory materials for new Aquascape pond owners including pond care guides, water treatment recommendations, and the Aquascape ecosystem overview.

Complete Technical Specifications

Aquascape Large Pond Kit - Which Version Is Right For You?

The 53037 is one of four 21’ x 26’ large pond kit configurations. All build the same pond. The difference is the pump and feature level:

What This Pond Will Support

At approximately 8,100 gallons across 546 square feet of surface area:

• Koi: 10–15 fish at standard stocking rates with the BioFalls 6000 filtration in place. Heavily stocked ponds (20+ koi) may benefit from supplemental aeration.
• Goldfish & Shubunkins: Excellent fit. More forgiving of stocking density than koi.
• Aquatic Plants: Hardy water lilies, lotus, cattail, iris, and other emergent species on marginal shelves contribute to natural biological balance.
• Year-Round Operation: 8,100 gallons provides sufficient thermal mass for fish to overwinter in most U.S. climates. A de-icer may be advisable in Zone 4 and below.
• Wildlife: Frogs, dragonflies, and songbirds naturally colonize a pond this size.

Installation Overview

The 53037 is rated intermediate to professional skill level. Realistic scope:

• Excavation: A 21’ x 26’ x 2’ pond moves approximately 50–60 cubic yards of soil. Most installers use a mini-excavator. DIY hand-digging is possible but labor-intensive.
• Timeline: Two-person experienced team: 2–3 days. Solo DIY: 4–6 days.
• What you supply: Rocks and gravel for pond floor and edges (Aquascape recommends fieldstone and pea gravel), water (garden hose fill takes 8–16+ hours for 8,100 gallons), fish and plants after cycling.
• Pump installation note: The 9-PL horizontal pump sits directly in the Signature Series 1000 Skimmer — no separate pump vault needed. The skimmer houses and protects the pump while the intake screen prevents debris from reaching the impeller.
• Professional installation: Call us to connect with an Aquascape-certified contractor in your area — (765) 508-4352.

Ideal For:

• Large backyard ponds
• Koi pond enthusiasts
• Natural swimming pond projects
• Luxury landscaping upgrades
• Contractor pond installations

Why Buy From Pond Pro Direct?

• Pond specialists, not a general retailer. Our team has hands-on experience with Aquascape systems and can answer pump sizing, installation sequencing, and filtration questions before you buy.
• Price Match Guarantee. Found a lower price on the 53037? Send us proof — we’ll beat it by $50 on orders over $2,000.
• Authentic Aquascape products. Sourced from authorized distribution. Full manufacturer warranty applies.
• 30-Day Return Period. Real purchase confidence.
• Call or text: (765) 508-4352 · Mon–Fri 9AM–5PM EST. We answer.