The Nexus Eazy is Evolution Aqua's premier filter system. It incorporates the industry proven Kaldnes Moving Bed technology coupled with the innovative Eazy mechanical filter.

Combined, they provide outstanding water clarity and quality, pump or gravity fed. Extremely easy to clean and maintain, with minimal running costs, the Nexus Eazy system is designed and built to last a lifetime.

How the Eazy works - The Kaldnes is retained in a stainless steel basket and has been proven to trap incredibly small particles of waste. Cleaning the Kaldnes is a simple matter of turning on the air tap to the settlement area thus agitating it and causing the waste matter to be dislodged from the media so it can be drained to waste.

Nexus Eazy systems are complete units and include the Nexus body, Eazy central vortex, air backwash line, air diverter valve, unionized ball valves to waste, and Kaldnes media for both the Eazy (static Kaldnes) and the bio-reactor (fluidized Kaldnes).The Nexus 220 Eazy and Nexus 320 Eazy are the same system in 2 sizes for different pond volumes.

  • Nexus 220 EazY for ponds up to 8900 gallons


How the Nexus Works


Gravity Fed Systems..

Design Drawings for plumbing

These are my drawing....




How to Start up a New Nexus


Nexus Filter

How to Install Nexus Filter

Beneifits of having a Nexus or Eazy Pod Filter

Salting your pond.
Applying Medications to you pond.
Adding Bacteria and Water Quality Maintence




Shopping Cart

Nexus 220 Eazy PUMP Fed

2640 gph max flow, ponds up to 4700 gallons [Nexus 210 Eazy Gravity Fed..... Nexus 210 Maxium Length 4.13'...Maxium Wideth 3.64']






Nexus 320 Eazy

3960 gph max flow, for ponds up to 8900g.....[Maxium Wideth 55"[4.58']...Maxium Height 40" [4.33']..... Nexus310 Weight 80 lb...Each bag of Kaldness 20lb. each. Total Ship Weight 190 lbs.]






Specification Eazy 210 Eazy 310
Max Flow Rate 10,000 litres/hr
2,200 UK gallons/hr
2,640 US gallons/hr
13,000 litres/hr
2,859 UK gallons/hr
3,431 US gallons/hr
Kaldness Media 50 ltrs bio/30 ltrs Eazy 100 ltrs bio/40 ltrs Eazy
Max Capacity 150 ltrs bio/30 ltrs Eazy 300 ltrs bio/40 ltrs Eazy
Max Pondsize 18,000 litres
4,000 UK gallons
4,800 US gallons
34,000 litres
7,500 UK gallons
9,000 US gallons
Volume of water in filter 112 UK gallons
510 litres
135 US gallons
185UK gallons
840 litres
222 US gallons


Kaldnes K1 50 Litres 1.77 Cubic Feet
Nexus200 & 300 Lid
Nexus 300/3000 Lid