If you’re a koi pond enthusiast or someone looking to upgrade your pond filtration system, the Evolution Aqua Nexus Filter Guide should be at the top of your list. It’s not just a filter—it’s a revolutionary system designed to deliver crystal-clear water with minimal maintenance. In this complete guide, you’ll learn everything you need to know about how the Nexus filter works, why it’s so popular, how to install it, and how to keep it running at its best.
What Is the Evolution Aqua Nexus Filter?
The Nexus Filter is a cutting-edge pond filtration system developed by Evolution Aqua, a UK-based company known for innovative pond and aquarium products. Unlike traditional filters that rely solely on mechanical or biological processes, the Nexus combines both into one seamless unit. It’s ideal for koi ponds and larger water features where clean, healthy water is essential for fish health and visual appeal.
At the heart of the Nexus filter is a two-stage filtration system:
- Mechanical filtration via the Eazy filter section filled with K1 Micro media, which traps solid waste.
- Biological filtration in the outer chamber using K1 moving bed media, where beneficial bacteria break down harmful ammonia and nitrites.
Choosing the Right Nexus Model
There are two main Nexus models available:
- Nexus 220+: Designed for ponds up to 18,000 liters (approx. 4,000 gallons).
- Nexus 320+: Suitable for ponds up to 34,000 liters (approx. 7,500 gallons).
Both models are compatible with pump-fed and gravity-fed systems, giving you the flexibility to choose what works best for your pond layout.
How to Install the Nexus Filter
Installing the Nexus is straightforward, but proper setup is crucial for optimal performance. You’ll need to decide whether to run a pump-fed or gravity-fed configuration.
- Pump-Fed Setup: Water is pumped from the pond into the Nexus filter, then gravity returns it back.
- Gravity-Fed Setup: Water flows from the pond into the Nexus via bottom drains, then a pump pushes it back after filtration.
Key installation tips:
- Make sure the filter base is level.
- Use appropriately sized pipework (usually 4-inch for gravity-fed).
- Ensure good access around the filter for cleaning and maintenance.
Maintenance Tips for the Nexus Filter
One of the biggest advantages of the Nexus system is how easy it is to maintain. There’s no need for backwashing or removing heavy media.
Routine maintenance includes:
- Cleaning the Eazy filter every 1-2 weeks depending on pond load.
- Flushing waste using the built-in valves.
- Monitoring biological media movement to ensure aeration is sufficient.
- Checking for clogs or slow flow, especially if you notice cloudy water.
With proper upkeep, your Nexus filter will run efficiently for years.
Conclusion
The Evolution Aqua Nexus Filter offers the perfect balance of advanced technology, ease of use, and robust performance. Whether you’re a beginner with your first koi pond or an experienced hobbyist, the Nexus is designed to make pond maintenance simpler and water quality better. It’s more than just a filter—it’s peace of mind for your pond’s ecosystem.
