Evolution Aqua Nexus 220+ The Evolution Aqua Nexus 220+ is a high-performance gravity-fed koi pond filtration system, engineered to deliver exceptional mechanical and biological filtration for medium-sized ponds. Built upon the proven and world-renowned Nexus platform, the Nexus 220+ introduces advanced K+Media in the moving bed chamber, providing significantly improved biological filtration and faster filter maturation. Using the trusted EAZY mechanical filtration system with K1 Micro, the Nexus 220+ efficiently removes solid waste before water enters the biological stage, where K+Media supports rapid and stable nitrification. Supplied Auto-Ready as standard, the Nexus 220+ allows simple future upgrading to the Nexus Automatic Cleaning System, reducing maintenance and improving long-term convenience. Key Benefits Enhanced biological filtration using advanced K+Media Faster filter maturation compared to traditional moving bed systems Proven EAZY mechanical filtration with K1 Micro Auto-Ready design for seamless upgrade to automatic cleaning Reliable gravity-fed filtration for koi ponds Designed for long-term stability and crystal-clear water Core Features EAZY mechanical filter: Utilises K1 Micro for highly efficient solids removal K+Media bio chamber: Provides superior surface area for beneficial bacteria Auto-Ready as standard: Factory-fitted fixings for Nexus Automatic Cleaning System Optimised flow rates: Balanced performance for mechanical capture and biological efficiency Proven Nexus layout: Trusted by koi keepers worldwide Technical Specifications Maximum Pond Size: 18,000 litres Recommended Flow Rate: 6,000 litres per hour Maximum Flow Rate: 10,000 litres per hour Water Volume in Filter: 510 litres K1 Micro Supplied (EAZY Filter): 18 litres K+Media Supplied (Bio Chamber): 50 litres Maximum K+Media Capacity: 150 litres Installation Type: Gravity-fed Application: Koi and garden ponds Who is this product for? The Evolution Aqua Nexus 220+ is ideal for koi keepers running small to medium ponds who want professional-grade filtration, excellent biological stability, and reduced maintenance. It’s perfect for hobbyists upgrading from older Nexus systems or conventional filters, and for anyone seeking future-ready automation via the Nexus Automatic Cleaning System.