Atlantic Oase 94632 Extra Large Clear Water Pond Kit 16' x 21' – Complete Koi Ecosystem with Skimmer & BioFalls

The Atlantic/Oase 94632 Extra Large Clear Water System Kit is a premium pond solution engineered to deliver exceptional water clarity, powerful circulation, and long-term reliability for ponds up to approximately 16' x 21'. Built with professional-grade components, this kit ensures a healthy, clean pond ecosystem with minimal maintenance.

The Clear Water System series eliminates the complexity of choosing compatible parts—pairing the ideal pump, skimmer, biological filter, liner, and plumbing into one complete, high-performance package.

Atlantic-Oase offers a Clear Water Guarantee with this kit. Not a marketing tagline — a guarantee. The system is engineered so that even with significant fish loads (up to 10 inches of fish per 100 gallons), it delivers crystal-clear water. That level of confidence comes from a specific engineering philosophy: clean from the top down and the bottom up, simultaneously, with components that are matched so precisely that no part is a bottleneck.

The 94632 Extra Large Clear Water System Kit builds a pond up to 16 feet by 21 feet — approximately 5,000 to 6,500 gallons of koi-capable ecosystem water. At the surface, the Atlantic PS15000 Pro Series Skimmer pulls debris off the water with a 14-inch weir before it can sink and decompose. At the bottom, the Atlantic TT9000 TidalWave3 asynchronous pump draws in settled waste and drives it up through 3-inch plumbing to the Atlantic BF3800 Pro Series FilterFalls, where biological filtration converts it to harmless nitrates before spilling back over a dramatic 38-inch waterfall.

That 38-inch waterfall is not incidental. It’s a design statement. While typical consumer pond kits produce 12–18-inch spillways, the BF3800’s 38-inch curtain of falling water is visually commanding at the scale this pond demands — and the biological media chamber behind it provides surface area sized for this pond’s fish load.

The kit also includes the AF1000 Auto Fill, which automatically tops off the pond as evaporation lowers the water level, and a complete LED lighting package for evening pond illumination. These are premium inclusions that equivalent competing kits typically sell separately — and that are completely absent from the current product page description.

Why Choose the Atlantic/Oase Extra Large Clear Water System Kit?

• The Clear Water Guarantee. Atlantic-Oase stands behind this kit’s performance with an explicit Clear Water Guarantee, covering ponds stocked up to 10 inches of fish per 100 gallons. No comparable guarantee exists on Aquascape or EasyPro ecosystem kits.
• Dual-direction filtration. The surface skimmer + bottom-intake pump approach removes debris from both directions simultaneously. Surface organic matter is captured before it sinks. Bottom-settled waste is drawn through the pump and driven upward to the biological filter. This top-down and bottom-up cleaning is why the Clear Water Guarantee is achievable.
• Professional-grade, lifetime-warranty components. The PS15000 skimmer and BF3800 FilterFalls both carry lifetime enclosure warranties. The TT9000 pump carries a 3-year limited warranty. These are contractor-specified components — not consumer-grade substitutes scaled up for an XL kit.A 38-inch waterfall. The BF3800’s 38-inch spillway produces a wide, dramatic curtain of falling water that defines the visual character of the pond. The scale is proportionate to a 16’ x 21’ water feature — narrow spillways look undersized at this pond area.
• 3-inch plumbing for maximum flow efficiency. The 3" x 50’ tubing delivers lower friction loss than 2" systems at the same flow rate, allowing the TT9000’s 8,800 GPH to reach the BF3800 without pressure restrictions. Proper plumbing sizing at this scale is the difference between a functioning ecosystem and an undersized one.
• Asynchronous motor efficiency. The TT9000 runs at 587 watts to deliver 8,800 GPH. That is extraordinary efficiency for a pump moving this volume of water continuously. The asynchronous motor combines magnetic induction efficiency with direct-drive power geometry, and the design is specifically built to resist clogging in hard water conditions.
• Auto Fill included. The AF1000 Automatic Fill Valve keeps the pond at the correct water level as evaporation reduces it — automatically, without manual monitoring. In a koi pond where running a pump dry damages the motor and stresses fish, this is not a luxury feature.
• LED lighting included. (2) WWCS2 pond lights plus a WW30X4 transformer and splitter extend the pond’s visual impact into the evening. The lighting package is included in the kit — not an add-on.

What's Included in the PK382025 Kit

Every component is engineered to work together as the Atlantic-Oase Clear Water System:

Atlantic PS15000 Pro Series Skimmer

The PS15000 is the largest skimmer in Atlantic’s Pro Series line, rated for up to 15,000 GPH max pump flow and 1,400 square feet of pond surface area. Its 14-inch Super Flow weir door maximizes skimming efficiency. The heavy-duty stainless steel framed trap net captures large debris, while the brush panel provides maximum mechanical filtration surface area. Dimensions: 28"W x 33"D x 31"H. Lifetime enclosure warranty. Houses and protects the TT9000 pump.

Atlantic BF3800 Pro Series FilterFalls (38" Spillway)

The BF3800 is Atlantic’s largest standard FilterFalls unit, producing a 38-inch waterfall spillway and biological filtration for ponds up to 8,000 gallons. Its oversized chamber handles the BF3800’s 6,000–8,000 GPH design flow range, and the expandable media design allows filtration upgrades as the pond matures and fish load increases. The overhanging weir with drip edge eliminates leaking from silicone seal failure. Includes media bag, filter pad, removable grate, and liner attachment flange. 3" FIPT bulkhead. Dimensions: 46.5"W x 30"D x 23"H. Lifetime enclosure warranty.

Atlantic TT9000 TidalWave3 Asynchronous Pump (8,800 GPH)

The TT9000 is Atlantic’s ultra-high efficiency 9,000-class asynchronous pump. Asynchronous motor technology combines magnetic induction efficiency with direct-drive power geometry, delivering 8,800 GPH maximum flow at only 587 watts (5.1A). The compact design (11"L x 7.25"W x 8"H) fits in the tightest pump vaults and skimmer chambers. Excellent resistance to fouling in hard water environments. Clog-resistant open-face vortex impeller. 2" MIPT inlet / 2" FIPT or 3" MIPT outlet. 20-foot cord. 3-year limited warranty.

AF1000 Auto Fill Valve

Automatically tops off the pond water level as evaporation reduces it, maintaining the correct operating level for the PS15000 skimmer and TT9000 pump. Connects to a standard garden hose or irrigation supply line. Eliminates the need for manual monitoring and prevents pump dry-run conditions.

(2) WWCS2 Pond Lights + WW30X4 Transformer and Splitter

Submersible pond lights and compatible transformer for evening pond illumination. The WW30X4 transformer powers up to 4 light connections. LED pond lights extend the visual enjoyment of the water feature into night hours and are designed for continuous submersed operation.

20’ x 25’ 45-mil EPDM Liner + Heavy-Duty Underlayment

The 20’ x 25’ liner builds a 16’ x 21’ pond with the edge overlap required for proper anchoring and finishing. 45-mil EPDM is UV-resistant, fish-safe, and rated for decades of continuous use. The heavy-duty underlayment is included and cushions the liner against rocks and roots beneath.

3" x 50’ Flexible Tubing

3-inch diameter flexible tubing connects the TT9000 pump outlet to the BF3800 FilterFalls inlet. The 3" diameter minimizes friction loss and pressure restriction at the flow rates this system generates — critical for efficient operation at the BF3800’s 6,000–8,000 GPH design range.

AWGCV30 Triton Check Valve

Prevents backflow through the pump discharge line when the system is powered off, protecting the BF3800 biological media from being backflushed and ensuring clean waterfall startup.

Installation Kit: Fittings, Thread Sealant, PVC Glue + (2) 12 oz. LF1100 FallsFoam

FallsFoam is a specialized expanding foam sealant used to direct water flow through the waterfall rocks and prevent seepage under and around the BF3800 and liner edges. Two 12 oz. cans are included. The installation kit also contains all fittings, thread sealant, and PVC glue for complete leak-free assembly.

Complete Technical Specifications

The Atlantic Oase Clear Water Guarantee

Atlantic-Oase backs the Clear Water System kit series with an explicit performance guarantee: clear water, even with fish loads up to 10 inches of fish per 100 gallons. This is the standard that the PS15000/BF3800/TT9000 system was engineered to meet, and Atlantic-Oase puts it in writing.

The guarantee rests on the dual-direction filtration approach: the PS15000 skimmer removes surface debris before it sinks; the TT9000 pump draws bottom-settled waste upward to the BF3800 biological filter. Simultaneously cleaning from the top and the bottom eliminates the accumulation patterns — uneaten food, fish waste, decomposing organics — that cause murky water in systems that only filter from one direction.

Perfect For

•  Large backyard ponds requiring strong circulation
•  Koi ponds with high bio-load capacity
•  Water gardens with large aquatic plant zones
•  Homeowners wanting a durable, low-maintenance system
•  DIY or contractor-built installations

Installation Overview

•  Excavation: A 16’ x 21’ pond at 2’ average depth moves approximately 35–45 cubic yards of soil. Mini-excavator strongly recommended. Two-person experienced team: 2–3 days. Solo: 3–5 days.
• System configuration: The TT9000 sits inside the PS15000 skimmer. Water is drawn in through the 14" skimmer weir (mechanical filtration), passes through the pump, exits through 3" tubing up to the BF3800 at the waterfall head (biological filtration), then cascades through the 38" spillway back into the pond. The AWGCV30 check valve prevents backflow when the pump is off.
• Auto Fill setup: The AF1000 connects to a 3/4" hose tap. Install near the skimmer to automatically maintain water level. One-time setup, then set-and-forget.
• FallsFoam application: Apply LF1100 FallsFoam between the BF3800 liner attachment flange and the pond liner, and in any gaps between waterfall rocks and the liner at the BF3800 outlet, to prevent water seeping around rather than flowing over the spillway.
• Freight delivery: Ships on a pallet (42"W x 36"H x 48"D). Plan for pallet delivery and staging near the build site before assembly.
• Professional installation: Call (765) 508-4352 — we can connect you with an Atlantic-Oase experienced contractor in your area.

Why Buy From Pond Pro Direct?

• We know Atlantic-Oase systems. Our team can answer questions about the Clear Water System design, PS15000 sizing, and BF3800 installation before you commit.Price Match Guarantee. Found a lower price? Send proof — we’ll beat it by $50 on orders over $2,000.
• Authentic Atlantic-Oase products. Full manufacturer warranty applies.
• 30-Day Return Period.
• Call or text (765) 508-4352 · Mon–Fri 9AM–5PM EST.•