Atlantic-OASE 94632 Extra Large Clear Water System Pond Kit 16' × 21' – Dual-Pump Koi Ecosystem with Skimmer, FastFalls & UV Filtration
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Description
The Atlantic-OASE 94632 Extra Large Clear Water System Kit builds a complete 16' × 21' ecosystem pond and is engineered around one promise: crystal-clear water, guaranteed, even with heavy koi loads. Unlike a conventional single-pump kit, the Clear Water System filters your pond from two directions at once — an Atlantic surface skimmer pulls floating debris off the top while an OASE AquaMax pump on the pond floor draws settled fish waste off the bottom and sends it to a pressurized multi-stage filter with built-in UV.
Every component is factory-matched and included: a 9000 GPH TT-Series waterfall pump, an OASE AquaMax Eco Premium 4500 bottom pump, a Skimmer with 14" weir, a 38" FastFalls waterfall unit, the BioTec ScreenMatic² 18000 pressurized filter, a Bitron C 55 UV clarifier, LED lighting, an auto-fill kit, 20'×25' EPDM liner, PVC, and installation kit. It handles fish loads up to 10" of fish per 100 gallons and is backed by Atlantic-OASE's Clear Water Guarantee.
Top-Down AND Bottom-Up Filtration
The Clear Water System's advantage is that it cleans your pond from two directions simultaneously — the single biggest reason it holds clarity under koi loads that overwhelm ordinary kits.
Skimmer + Waterfall Pump
The 14" weir Skimmer removes leaves and floating debris off the surface before they sink and decay, while the 9000 GPH TT-Series pump drives the 38" FastFalls waterfall for circulation and aeration.
AquaMax Pump + Pressurized Filter + UV
The OASE AquaMax Eco Premium 4500 sits on the pond floor, drawing settled fish waste and heavy organics into the BioTec ScreenMatic² 18000 — a pressurized filter delivering mechanical, biological, and Bitron C 55 UV clarification in one canister.
Complete Component List — Atlantic-OASE 94632
Pumps (Dual)
- 9000 GPH TT-Series waterfall pump (model 73931)
- OASE AquaMax Eco Premium 4500 bottom pump (model 87583)
- 3" Check Valve Assembly (model 74220)
Filtration
- Skimmer with 14" weir, 15,000 GPH (model 74037)
- 38" FastFalls waterfall filter (model 74229)
- BioTec ScreenMatic² 18000 pressurized filter (model 42975)
- Bitron C 55 UV clarifier (model 56936)
Liner System
- 20' × 25' fish-safe EPDM liner
- Underlayment — two pieces, 12' × 25' each
Plumbing
- 2" × 50' flexible PVC
- 3" × 50' flexible PVC
- Installation kit with PVC glue & thread sealant
Lighting & Water Level
- 2× Warm White Compact Spotlight, 2 Watt (model 74106)
- Warm White 4-light Wiring Kit (model 74122) — supports 2 more lights, no added hardware
- Auto Fill Kit (model 74246)
Waterfall Finishing
- 2× Falls Foam, 12 oz (model 74198)
Technical Specifications
| Kit SKU | 94632 (previously CWS382025) |
|---|---|
| Pond Size | 16' × 21' (L × W) |
| Waterfall Pump | 9000 GPH TT-Series (model 73931) |
| Bottom / Filter Pump | OASE AquaMax Eco Premium 4500 (model 87583) |
| Skimmer | Skimmer with 14" weir, 15,000 GPH (model 74037) |
| Waterfall Filter | 38" FastFalls (model 74229) |
| Pressurized Filter | BioTec ScreenMatic² 18000 (model 42975) |
| UV Clarifier | Bitron C 55 (model 56936) |
| Liner | 20' × 25' fish-safe EPDM |
| Underlayment | 2 pieces, 12' × 25' each |
| Tubing | 2" × 50' + 3" × 50' flexible PVC |
| Lighting | 2× Warm White 2W spotlights + 4-light wiring kit (models 74106 & 74122) |
| Water Level | Auto Fill Kit (model 74246) |
| Check Valve | 3" Check Valve Assembly (model 74220) |
| Fish Load Capacity | Up to 10" of fish per 100 gallons |
| Boxed Weight | 573 lbs — ships freight on a pallet |
| Shipping | Freight only; carrier schedules delivery, adult signature required |
Why the Atlantic-OASE Clear Water System?
- Dual-pump, two-direction filtration. Cleaning the surface and the pond floor at the same time is why this system holds clarity under heavy koi loads that overwhelm single-pump kits.
- All-in-one pressurized filter with UV. The BioTec ScreenMatic² 18000 combines mechanical screening, biological treatment for ammonia/nitrite/nitrate, and Bitron C 55 UV clarification in one canister — and its self-cleaning screen means filter cleaning takes minutes without getting dirty.
- Energy-efficient OASE + TT-Series pumps. German-engineered OASE AquaMax efficiency on the filter side keeps a large-pond system's running costs in check.
- Auto-fill keeps the level right. The included Auto Fill Kit tops off evaporation automatically — a genuine convenience on a 16'×21' pond.
- LED lighting included and expandable. Two warm-white spotlights plus a 4-light wiring kit let you add two more lights later with no extra hardware.
- Clear Water Guarantee. Atlantic-OASE guarantees the clarity this system delivers — a level of assurance most kits don't offer.
Frequently Asked Questions
What makes the Clear Water System different from a standard pond kit?
Most kits use a single pump in the skimmer feeding an upflow waterfall filter. The Clear Water System uses two pumps: an Atlantic skimmer and waterfall pump clean the surface, while an OASE AquaMax pump on the pond floor sends bottom waste to a pressurized BioTec ScreenMatic² filter with UV. Filtering from the top and bottom at once is why it holds clarity under heavy fish loads.
What size pond does the 94632 build, and how many fish can it hold?
It builds a 16' × 21' pond and includes a 20' × 25' liner. The system is rated for fish loads up to 10 inches of fish per 100 gallons — a generous capacity that makes it well suited to koi keepers, not just water gardeners.
Why does it have two pumps?
The 9000 GPH TT-Series pump runs the waterfall and surface circulation; the OASE AquaMax Eco Premium 4500 sits on the pond bottom and feeds the pressurized filter with settled waste. Separating the two jobs lets each be optimized — strong waterfall flow up top, efficient bottom-drain filtration below.
Does the filter include UV, and is it hard to clean?
Yes — the BioTec ScreenMatic² 18000 has a built-in Bitron C 55 UV clarifier for algae control, plus mechanical and biological stages in one pressurized canister. Its self-cleaning screen design means routine cleaning takes only minutes and stays hands-clean.
How does it ship?
The 94632 weighs about 573 lbs and ships freight on a pallet. The carrier contacts you to schedule delivery (typically a 4-hour window), and an adult 18 or older must be present to sign. Inspect all components on arrival and note any visible damage before signing.
What still needs to be purchased separately?
The kit includes liner, underlayment, both pumps, skimmer, waterfall, filter, UV, plumbing, lighting, auto-fill, and installation materials. You'll separately source rocks, gravel, and aquatic plants for the decorative finish, and Atlantic recommends adding beneficial bacteria weekly. If you're building a longer stream, ask us about additional stream liner.
Why Buy From Pond Pro Direct?
- Authorized Atlantic-OASE dealer — genuine product with full manufacturer warranty and Clear Water Guarantee support.
- Complete pond kit selection — Atlantic-OASE, Aquascape, EasyPro, and Blue Thumb, from small gardens to large koi systems. Compare with us: (765) 508-4352.
- Expert large-build guidance — excavation, dual-pump plumbing layout, and startup help before your freight kit arrives.
- 30-Day Return Period. Call or text (765) 508-4352, Monday–Friday, 9 AM–5 PM EST.
The clearest water a 16'×21' pond can deliver
The Atlantic-OASE 94632 Extra Large Clear Water System Kit — dual-pump top-down and bottom-up filtration, BioTec ScreenMatic² pressurized filter with UV, 38" FastFalls, 14" skimmer, LED lighting, auto-fill, and a 20'×25' EPDM liner — everything factory-matched and backed by the Clear Water Guarantee.
Planning a large koi build? Call or text (765) 508-4352 — Mon–Fri, 9 AM–5 PM EST.
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