Atlantic Water Gardens PK382530 Extra Large Pond Kit – Complete Koi Ecosystem with Skimmer, BioFalls & Pump

The Atlantic Water Gardens PK382530 Extra Large Pond Kit provides everything needed to build a professionally engineered backyard pond up to 21' x 26'. Designed with contractors and serious DIY pond builders in mind, this complete kit includes a high-capacity skimmer, BioFalls biological filter, powerful pump, premium liner, underlayment, and all necessary plumbing components.

If you’re looking to create a large, natural-style pond with exceptional water clarity, strong water movement, and long-term reliability, this is one of the top-tier pond kits on the market.

A 21' x 26' pond is 546 square feet of water. It is large enough to support a serious koi collection, dramatic waterfall features, and the kind of aquatic ecosystem that defines an outdoor space. It is also large enough to expose the limitations of undersized equipment. The Atlantic PK382530 is built for this scale.

The PK382530 pairs the BF3800 Big Bahama FilterFalls — with its 38-inch waterfall spillway and 8,000-gallon biological filtration rating — with the PS15000 Big Bahama Skimmer, which handles up to 15,000 GPH and skims ponds up to 1,400 square feet. Driving the system is the Atlantic A-31 Tidal Wave direct drive pump: cast iron and stainless steel construction, 9,300 GPH at 5-foot head, 36-foot maximum head height. This is not a residential pond pump pressed into service on an extra-large build. It is engineered for it.

The kit ships complete on a pallet — 25' x 30' 45-mil EPDM liner, (2) 12' x 25' heavy-duty underlayment sections, 3" x 50' flexible tubing, AWGCV30 check valve, AF1000 Auto Fill, (2) WWCS2 LED spotlights with WW30X4 transformer and splitter, (2) 12 oz. FallsFoam cans, and a full installation kit with fittings, thread sealant, and PVC glue. Everything required to build this pond is in one pallet delivery.

Questions before you buy? Call or text (765) 508-4352, Monday through Friday, 9 AM to 5 PM EST. At this investment level, talking through your build site, waterfall height, and component layout before ordering is always worth

Why Choose the Atlantic PK382530 Extra Large Pond Kit?

• 38-inch waterfall. The BF3800's 38-inch spillway is proportionate to a 21' x 26' pond in a way that 16" or 24" spillways are not. A 546-square-foot pond deserves a waterfall curtain that commands the landscape. The BF3800 delivers that — and it's buried in the ground, topped with fieldstone, completely hidden.
• High-head pump for ambitious builds. The A-31 is a direct drive cast iron pump with 36-foot maximum head height. If your waterfall runs tall or long — across a stream, over a multi-tier rock formation, or up a significant grade — the A-31 maintains strong flow where asynchronous pumps taper off. At 9,300 GPH at 5-foot head, flow remains 8,150 GPH at 10 feet and 6,830 GPH at 15 feet.
• 1,400 sq. ft. skimmer rating — room to grow. The PS15000's 1,400 sq. ft. surface skimming rating exceeds the 546 sq. ft. of this pond's footprint by a wide margin. That headroom matters as the ecosystem matures and fish loads increase. The PS15000's 14-inch Super Flow weir, net, and brush panel filtration are sized for exactly this application.
• Lifetime enclosure warranties. Both the BF3800 FilterFalls and PS15000 Skimmer carry lifetime warranties on their enclosures from Atlantic Water Gardens. The A-31 pump carries a 2-year warranty. These are not disposable pond components.
• Auto fill included — $499 below MSRP. The AF1000 Auto Fill maintains consistent pond water level during evaporation seasons without manual intervention. Atlantic's list price for the PK382530 is $5,387.99. Pond Pro Direct's price of $4,888.99 is a $499 savings with free shipping and our price match guarantee.
• Expandable lighting. The included WW30X4 transformer and splitter runs the two WWCS2 pond spotlights — and has open ports for two additional spotlights with no additional hardware or wiring. If you want more pond illumination after installation, adding lights is plug-and-play.

What's Included - Complete Component List

 Every component below is matched to the 21' x 26' pond footprint at the 25' x 30' liner size: 

Atlantic BF3800 Big Bahama Pro Series FilterFalls

Biological waterfall filter and waterfall base in one unit. The BF3800's 38-inch wide spillway creates a broad, dramatic curtain of falling water scaled to this pond's 26-foot length. Pond water enters through a 3" FPT bulkhead, flows through dual Bio-Tech filter mats and a media bag, and spills over the 38-inch rock lip into the stream or pond below. The bottom chamber accepts bulkheads on all sides for maximum plumbing flexibility, and the filter is designed to expand filtration capacity as the ecosystem ages and fish loads increase. Buried in the ground with the rock lip at grade level, the BF3800 disappears completely into the landscape.

Specs: 38" spillway · 6,000–8,000 GPH pump flow range · Up to 8,000 gallon pond rating · 3" FPT bulkhead · Dimensions: 46.5"W x 30"D x 23"H · Matched to PS15000 · Lifetime warranty on enclosure.

Atlantic PS15000 Big Bahama Pro Series Skimmer

The PS15000 houses and protects the A-31 pump while clearing surface debris through a 14-inch Super Flow weir door. The stainless steel framed trap net catches large debris like leaves and grass clippings; the heavy-duty brush panel provides secondary mechanical filtration. Black anodized stainless steel faceplate hardware maximizes concealment in naturalized installations. The two-pump capability means a second pump can be added later for a second waterfall or increased flow without replacing the skimmer.

Specs: 14" Super Flow weir · 15,000 GPH max pump flow · 1,400 sq. ft. skimming rating · Net + brush panel filtration · Dimensions: 28"W x 33"D x 31"H · Lifetime warranty on enclosure.

Atlantic A-31 Tidal Wave A-Series Direct Drive Pump

The A-31 is a high-head, high-volume direct drive pump built for the longest waterfall runs and tallest falls. Cast iron and stainless steel housing, double silicone carbide mechanical seals, dual drive bearings, and a fiber-reinforced vortex impeller are the construction hallmarks of a pump designed for continuous-duty outdoor operation. Thermal overload protection shuts the pump down in low-water conditions to prevent motor damage. This is why the PK382530 uses the A-31 where the smaller PK382025 uses the lighter-duty TT9000: the extra-large pond build needs the head pressure.

Specs: 9,300 GPH @ 5' head · 8,150 GPH @ 10' head · 6,830 GPH @ 15' head · 36' max head · 1 HP · 115V / 60Hz · 10 amps · 1,160 watts · 3" FIPT outlet · 30' cord · 48 lbs. · Dimensions: 11"L x 7"W x 18"H · 2-year warranty.

25' x 30' 45-mil EPDM Liner + (2) 12' x 25' Heavy-Duty Underlayment

45-mil EPDM rubber liner — the professional standard for large-scale water feature construction. UV-resistant, fish-safe, flexible enough to conform to complex multi-shelf excavation contours. The 25' x 30' size builds the 21' x 26' pond at standard depth with adequate edge overlap for anchoring, shelving, and stream transitions. Two sections of heavy-duty underlayment (12' x 25' each) cover the full liner footprint, cushioning against rocks and roots beneath.

3" x 50' Flexible Tubing + AWGCV30 Check Valve

3-inch diameter flexible tubing runs from the A-31 pump outlet inside the PS15000 to the BF3800's 3" FPT bulkhead inlet. At 50 feet, the tubing accommodates most 21' x 26' pond layouts with room for stream runs. The AWGCV30 check valve prevents backflow through the pump discharge line when the system is off, protecting the BF3800's filter media from backflushing and ensuring a clean waterfall restart.

AF1000 Auto Fill

Automatic pond water level maintenance. The AF1000 connects to a standard 1/2" water supply line and maintains the pond at a set fill level during evaporation periods, reducing the manual monitoring burden — especially critical during summer peak evaporation. This is included in the PK382530 at no additional cost.

(2) WWCS2 LED Pond Spotlights + WW30X4 Transformer & Splitter

Two submersible LED pond spotlights for evening pond illumination, powered by the WW30X4 transformer and splitter. The WW30X4 has four output ports — two additional WWCS2 spotlights can be added with no additional hardware. If you want a fully lit 21' x 26' pond after the initial build, adding two more lights is plug-and-play.

(2) 12 oz. FallsFoam Cans (LF1100)

FallsFoam is applied between rocks at the BF3800 spillway and stream edges to direct water flow over the waterfall face rather than seeping underneath rocks. Two 12 oz. cans are included — sufficient for most large waterfall installations. FallsFoam cures black, blending with dark rock and liner color.

Installation Kit

Fittings, thread sealant, and PVC glue for all plumbing connections from the A-31 pump through the check valve to the BF3800. All hardware required for installation is included.

Complete Technical Specifications

The A-31 Pump - Why This Pond Gets A Different Pump

Buyers comparing the PK382530 to the smaller PK382025 will notice the pump is different. The PK382025 uses the TT9000 TidalWave3 — an asynchronous pump that is quiet, energy-efficient, and draws approximately 587 watts. The PK382530 uses the A-31 — a direct drive pump that draws 1,160 watts.

The reason is head pressure. The A-31's maximum head height is 36 feet. The TT9000's is approximately 25 feet. As a pond build grows in scale, waterfall runs get longer and taller: the stream may travel 20, 30, or 40 feet; the waterfall head may rise 4, 6, or 8 feet above the pond surface. At those head heights, the TT9000's flow degrades significantly. The A-31 maintains high flow — 6,830 GPH at 15-foot head, 9,300 GPH at 5-foot head. It is the right pump for ambitious large-pond waterfall builds.

If energy efficiency is the primary concern and your waterfall run is short and low, call us before ordering to discuss whether the PK382025 or a custom pump selection better fits your specific build. (765) 508-4352.

Ideal For

•  Large backyard ponds
•  Natural water garden installations
•  Koi ponds requiring strong filtration
•  Professional pond contractors
•  Homeowners wanting the most complete “all-in-one” kit

Why Buy From Pond Pro Direct?

• Atlantic Water Gardens authorized reseller — full manufacturer warranties on every component.
• $499 below Atlantic MSRP. Price Match Guarantee: find a lower price and we'll beat it by $50 on orders over $2,000.
• Pre-purchase planning support. Building a 21' x 26' pond is a significant project. Our team can discuss your site, waterfall height, pump selection, and build sequence before you order. Call (765) 508-4352.
• 30-day return period.
• Secure encrypted checkout. Free shipping on this kit.

Frequently Asked Questions: