Evolution Aqua Surge Filter


Evolution Aqua Surge Filter


Innovative Pond Filter with UVC

The Surge Filter is an innovative filter that will help to deliver crystal clear, healthy water for ponds up to 5,000 Litres. There are no dirty sponges or foams to clean so you get to keep your hands dry, giving you more time to enjoy your pond.

Key Features

  •  Keep your hands dry - Foam free, easy self-cleaning technology.

  • More time to enjoy your pond - Reduces filter cleaning and maintenance.

  • Crystal clear and healthy water - Enhanced filtration with K+Media and integrated UVC.

How it works?

As pond water is pumped up through the Surge Filter the K+Media becomes a mechanical barrier that traps debris as it flows through. Waste particles remain trapped within the K+Media until they are dislodged and flushed away during the patented Air Clean Technology cleaning process.

How it cleans?

Air Clean Technology uses open cell K+Media and air to clean the filter providing a low energy and cost-effective solution. With the pump off, ball valves closed, and waste valve open, air is drawn into the filter. As air and water mix inside the filter, the media starts to move chaotically, dislodging the trapped waste. Dirty water then exits the bottom of the filter via the waste line, leaving clean media.






5,000 Litres 

1,100 Gallons

1,320 US Gallons


¾”, 1”, 1¼” 

20mm, 25mm, 32mm 

¾”, 1”, 1¼” 


¾”, 1”, 1¼”

20mm, 25mm, 32mm 

¾”, 1”, 1¼” 






3,500 lph

771 gph

925 US gph


2,500 lph

550 gph

660 US gph


4.5 Litres

4.5 Litres

4.5 Litres


19 Litres 

4.2 Gallons 

5 US Gallons


Installing the Surge Filter

The Surge Filter is easy to install and is simple and quick to clean, by way of Evolution Aqua’s patented Air Clean Technology. This unique air syphon design allows air to be drawn into the filter as it empties which causes the water to agitate, effectively cleaning the K+Media. There are no dirty sponges or foams to clean so you get to keep your hands dry, giving you more time to enjoy your pond.

Koi Delivery

Koi delivery is available via Overnight Courier (+£29.95). Fish are scheduled to arrive before 2:00pm, and you MUST be in to sign for the fish. Delivery days are normally Wednesday or Friday, but this may change. We will contact you with your delivery options. Delivery must be made within 2 weeks of purchase.

Shipping Information

Koi Collection

Collection of your Koi must be made within 2 weeks of purchase. We will contact you with available collection dates.

Contact Us

A Range Of Varieties

We breed a number of varieties of Koi each year and use our many years of experience to select the very best.

Hundreds Of Awards

We breed the finest Koi (Nishikigoi) in the UK and have won hundreds of awards for their owners over the years.

Online Or In-Person

You can buy the Koi we breed direct from us by visiting our farm in Oxfordshire, or you can order online.
Find Us On
American Express Apple Pay Diners Club Discover Google Pay Maestro Mastercard PayPal Shop Pay Union Pay Visa