Evolution Aqua Nexus 320+ The Evolution Aqua Nexus 320+ is a premium gravity-fed koi pond filtration system, designed to deliver exceptional mechanical and biological filtration for larger ponds. Building on the world-renowned Nexus platform, the Nexus 320+ introduces K+Media in the moving bed chamber, significantly enhancing biological performance and accelerating filter maturation. Designed for serious koi keepers, the Nexus 320+ efficiently removes solid waste using the proven EAZY mechanical filtration system with K1 Micro, while the outer chamber delivers powerful nitrification using high-performance K+Media. Supplied Auto-Ready as standard, the Nexus 320+ allows effortless upgrading to the Nexus Automatic Cleaning System, offering future-proof convenience and reduced maintenance. Key Benefits Enhanced biological filtration using advanced K+Media Faster maturation compared to traditional moving bed systems Proven EAZY mechanical filtration with K1 Micro Auto-Ready design for easy upgrade to automatic cleaning Reliable, gravity-fed performance for large koi ponds Designed for long-term stability and excellent water clarity Core Features EAZY mechanical filter: Utilises K1 Micro to efficiently trap and remove solid waste K+Media bio chamber: Provides vastly improved surface area for beneficial bacteria Auto-Ready as standard: Factory-fitted fixings for Nexus Automatic Cleaning System Optimised flow rates: Ensures effective waste capture without compromising bio performance Modular Nexus design: Trusted layout refined over years of real-world koi pond use Technical Specifications Maximum Pond Size: 34,000 litres Recommended Flow Rate: 11,000 litres per hour Maximum Flow Rate: 13,000 litres per hour Water Volume in Filter: 840 litres K1 Micro Supplied (EAZY Filter): 20 litres K+Media Supplied (Bio Chamber): 100 litres Maximum K+Media Capacity: 300 litres Installation Type: Gravity-fed Application: Koi and large garden ponds Who is this product for? The Evolution Aqua Nexus 320+ is ideal for koi keepers managing medium to large ponds who demand reliable waste removal, excellent biological stability, and future-ready automation. It’s perfect for hobbyists upgrading from older Nexus models or traditional filtration systems, as well as installers seeking a proven, high-performance solution with upgrade flexibility.