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For any one that wants clear water in their koi pond choosing the right filtration system is essential.

A filter system will eliminate particulate and biological wastes from the pond water, and you will want to choose one that provides the proper filtration for your type and size of pond.


Ideally plan what filter system you are having prior to the construction of the pond, however, adding to an existing pond is not a problem. For the best long term results we would advise to invest in the filtration system that best suits your budget and your unique pond set up.

Firstly you need to know the amount of water that your pond will be holding. This is a simple calculation that can tell you how many gallons of water your pond will hold, and therefore indicate the size and type of filter system that you require.

Measuring in Inches L x W x D = then divide by 231 Measuring in Feet L x W x D then multiply by 7.48

A good filtration system provided many functions including improving water quality, controlling the ammonia and nitrate levels, adding movement to the water ,which in turn adds oxygen to the water.

The cost of filtration equipment may appear rather expensive, however, investing in the right equipment from the beginning will save you money in the long run, remember quality is worth paying for.

There are a number of great filtration systems available on the market today and we have found that one of the best is the multi award winning Nexus Filter Systems from Evolution Aqua.

Easy Pod Complete

Easy Pod Complete FilterA complete filtration system with build in UV Clarifier.

  • Mechanical, biological and ultra violet filtration
  • Simple to install & easy to maintain
  • 580mm (w) x 655mm (h) x 710mm (d)

EazyPod Filter Complete With Integrated 18 Watt UV and Air Pump 70 Kit

Evolution Aqua’s class leading small pond filter has just got even easier! Now fitted with an integrated 18 watt UV clarifier, the EazyPod Complete really is the ideal solution for pond keepers who want an all-in-one, easy to use, filtration system. This filter features all of the benefits of Evolution Aqua’s highly successful EazyPod, which means it delivers crystal clear and healthy pond water with ease.

Ideal for garden ponds up to 10,000 litres

In built 18 watt UV Clarifier

Easy to install and clean

Supplied with Air Pump 70 Kit

Fitted with ½” Slide Valve and Hosetail on Inlet and Waste

Pump Fed Set Up Only

Nexus 220


Introducing the next generation of Nexus Filtration Systems.

The Nexus 320 and Nexus 220 filtration systems deliver dramatically improved levels of clarity for ponds. Building on the success of the award winning Nexus range this new generation of filters cleverly combine mechanical and biological filtration into one advanced filter system.

The Nexus 220 and 320 feature a re-designed Eazy filter which utilises the all new K1 Micro Filter Media, in a static bed, to deliver improved levels of mechanical filtration. The Nexus filter systems also use the acclaimed K1 Media in the moving bed to deliver outstanding levels of biological filtration. Together these filter media deliver crystal clear and healthy water.

Click here for installation and cleaning instructions.

Key Features and Benefits

Improved Mechanical Filtration

The new design of the Eazy enables the Nexus to capture solids more effectively than before. K1 Micro is used inside the re-designed Eazy helping to deliver improved capture of fine particles, delivering unrivalled mechanical filtration.

Improved Flow

The new Eazy features an improved pattern of slots in the stainless steel body which makes the filter more efficient. Water can pass through all parts of the Eazy much more effectively. This feature combined with the use of K1 Micro makes for improved flow rates through the entire mechanical filter.

Dramatically Improved Clarity

The Nexus 320 and 220 filter systems use two types of filter media to deliver optimum levels of clarity in your pond. K1 Micro is used in the Eazy to improve mechanical filtration while the tried and tested K1 Media is used in the moving bed outer chamber, delivering the biological filtration.

Easy To Clean And Maintain

A key feature of all Nexus filtration systems is the sheer ease of maintenance. This still remains the case with the new Nexus systems. Simply operating a combination of air valves and waste valves ensures that the Eazy filter and main filter body can be easily cleaned to deliver consistent water quality.

Better Solids Handling

Inside the centre mechanical stage of the Nexus, there is a much larger area for solid waste to be captured and to settle. This area can then be cleaned even easier than before ensuring the filter does not clog up with unnecessary amounts of waste.

Removable Eazy

All Eazy filters used in the Nexus 320 / 220 series can be removed if needed. This added feature is ideal when undertaking further maintenance.

Nexus 320


For further information on any of the Nexus Filtration systems , contact a member of the Pond Stars UK team today, other filtration systems are available to suit your pond and budgets.