Evolution Aqua Nexus 320+ – Advanced Filtration System for Large Koi & Garden Ponds
The Evolution Aqua Nexus 320+ is one of the most advanced and efficient pond filtration systems available for hobbyists and professionals alike. Designed for ponds up to 34,000 litres, this hybrid mechanical and biological filter delivers crystal-clear, healthy water with minimal maintenance. It’s an upgrade of the popular Nexus 320, now “Auto Ready”—with built-in fixings to easily connect the Nexus Automatic Cleaning System (sold separately).
The Nexus 320+ features an Eazy™ filter chamber at its core, filled with K1 Micro Media, which captures fine solids and offers superb mechanical filtration. Surrounding this is a large outer bio-chamber filled with K+ Media, Evolution Aqua’s latest high-surface-area media, which supports powerful biological filtration. Together, they offer outstanding clarity and water quality—even in heavily stocked koi ponds.
Key Features:
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For Ponds Up to 34,000 Litres – Ideal for koi and large fish ponds
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Dual-Chamber Design – Eazy™ mechanical filtration + K+ moving-bed biological filter
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Auto-Ready – Integrated fixings to connect Nexus Automatic Cleaning System
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Pre-Filled with Media – K1 Micro in the inner chamber, K+ Media in the outer
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Low Maintenance – Easy cleaning with air-assisted backwash and waste valve
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Highly Efficient Design – Optimised water flow with minimal pressure loss
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Pump or Gravity-Fed Options – Flexible setup to suit any pond configuration
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Specifications:
| Specification | Detail |
|---|---|
| Max Pond Volume | 34,000 litres (7,500 gallons) |
| Max Flow Rate | 13,000 LPH (recommended 11,000) |
| Media Capacity | K1 Micro (inner) + K+ Media (outer) |
| Filter Volume | 840 litres total |
| Dimensions (W x H) | Approx. 1.2m x 1.2m |
| Inlet/Outlet Sizes | 110mm |
| Cleaning System | Manual or optional Auto Upgrade |
| Installation | Pump-fed or gravity-fed |
💧 How It Works:
Water enters the inner chamber where the Eazy filter and K1 Micro Media remove debris and fine solids. It then flows into the outer chamber filled with K+ Media, where billions of beneficial bacteria break down ammonia and nitrite. When it’s time to clean, you can easily activate the waste valve and agitate the media using an air pump (included if Auto Kit is added) to flush out waste—no dismantling required.
Ideal For:
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Koi ponds with high fish stocking levels
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Pond keepers who want premium water clarity and biological balance
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Systems using drum filters, skimmers, or UV clarifiers
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Users looking to add an automated cleaning upgrade (Nexus Automatic Kit)
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Professional or hobbyist-level pond installations
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