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Advanced filtration systems for Koi ponds now with NEW K+Media
Evolution Aqua have launched the Nexus 320+filtration systems. Building on the tried and tested technology that has been ever present in the world renowned Nexus, the team at Evolution Aqua have gone even further to enhance their number one Koi pond filter.
The Nexus 320+ filters now come with a new filter media called K+Media in the moving bed outer chamber for vastly improved biological filtration and faster filter maturation. The new Nexus+ filters are also supplied “auto ready”, with factory fitted fixings already in place, making it even easier to upgrade to the Nexus Automatic Cleaning System.
Faster filter maturation and unrivalled water clarity
Maximum pond size: 34,000 litres / 7,500 gallons
Recommended flow rate:11,000 litres per hour
Maximum flow rate:13,000 litres per hour
Volume of water in Nexus:840 litres
Amount of K1 Micro in EAZY:20 litres
Amount of K+Media supplied:100 litres
Maximum amount of K+Media:300 litres
How the Nexus+ Works
The mechanically clean water then passes to the outside chamber of the Nexus+ where the new K+Media Moving Bed is located for biological treatment prior to being returned to the pond. At this stage, biological breakdown occurs through different strains of bacteria and filter feeders living on the vast protected surface area of each piece of the K+Media. These bacteria convert Ammonia and Nitrite into less harmful Nitrate. Water then passes through the exit grill into the outlet, returning back to the pond.
Nexus+ Dimensions
Installing the Nexus+
The Nexus+ MUST be installed on a solid, level base, a minimum of 1.2 metres x 1 metre. Failure to do this will cause irreparable damage to the filter and will therefore invalidate your warranty.
GRAVITY-FED INSTALLATIONS
By this we mean that your pump is going to be used to return the filtered water to the pond and therefore your filter will be supplied by gravity via a larger diameter pipe. In this situation the water level in the filter will be at the same level as the pond.
PUMP-FED INSTALLATIONS
By this we mean that if your pump is going to be used to supply the water to the filter, and the filtered water then returns back into your pond via gravity, i.e. down a waterfall, or through a large diameter pipe, this is referred to as PUMP FED (i.e. the water is fed to the filter using a pump).
Specifications
| Model | Max Pond Size | Max Flow Rate | Volume of Water in Nexus | Amount of K1 Micro in Eazy Chamber | Amount of K+Media supplied in Bio-chamber | Max Capacity for K+Media |
|---|---|---|---|---|---|---|
 |
18,000 litres 4,000 UK Gallons 4,800 US Gallons |
10,000 litres/hour 2,200 UK Gallons/hr 2,640 US Gallons/hr |
510 litres 112 UK Gallons 135 US Gallons |
18 litres of K1 Micro inside the Eazy | 50 litres of K+Media in the bio-chamber | 150 of K+Media in the bio-chamber |
 |
34,000 litres 7,500 UK Gallons 9,000 US Gallons |
13,000 litres/hour 2,859 UK Gallons/hr 3,431 US Gallons/hr |
840 litres 185 UK Gallons 222 US Gallons |
20 litres of K1 Micro in the Eazy | 100 litres of K+Media in the bio chamber | 300 litres of K+Media in the bio chamber |
New advanced filtration media
Plastic media, for use in biological pond filters - specifically in moving bed bio reactors, was pioneered by Evolution Aqua, some 20 years ago. In recent years, other plastic media have come onto the market, usually with the aim of trying to get more and more surface area. However, one drawback to using plastic media has always been the time it takes to establish a stable biofilm – essential for good filtration.
After many years of research, Evolution Aqua have now developed a new media that not only gives class leading surface area, but also overcomes the problem of long maturation times.
K+Media is designed and manufactured in the UK by Evolution Aqua. This advanced media, with its innovative design, and class leading surface area provides enhanced biological and mechanical filtration.
As Evolution Aqua extrude K+Media, Minerals and Enzymes are added to the raw material. The result of this process, unique to Evolution Aqua, is a filtration media that not only outperforms most of its competitors due to its large protected surface area, but also answers the problem of how to speed up the time taken to mature your filter.
During the extrusion process, Evolution Aqua add a range of minerals, along with magnesium, calcium, enzymes and salt to the raw material that is used to manufacture K+Media. The result means that K+Media will mature much faster than many other types of media.
- The addition of these minerals creates a rough surface on the media. This textured surface has a microscopic honeycomb of peaks and craters that allow waste particles to collect, and nitrifying bacteria to form.
- The minerals act as a food source for the bacteria, helping the bacteria to develop and multiply at a faster rate, further improving maturation times.
- Calcium alone has proven advantages for developing and maintaining effective bio-films.
- The enzymes that are added also help to make the media “sticky” so waste particles can adhere to media easier.
- Salt is added during the extrusion process, which is dissolved during the cooling process, leaving a rough surface on which bio-film can easily adhere.
Increased surface area
With a new shape and profile, K+Media has also been designed to have an increased and class leading surface area, meaning an overall surface area of 1,350m2 per m3. More importantly for biological filtration, the protected surface area of K+Media is 1,025m2 per m3. This allows a stable bio-film to form and remain intact when used in moving bed biological filtration, as in the new Nexus+.
Stable bio-film development
The shape of K+Media optimises the amount of “quiet zones” within the media where a stable bio-film can develop. Whilst K+Media keeps the integral profile of K1 Media at its core, there is an extra layer of cells and fins around the outside of each piece that enable microscopic organisms such as Rotifers and Vorticella to thrive. This is an additional benefit as competitor media do not have such “quiet zones” that would allow these higher lifeforms of filter feeders to develop. The bacteria and organisms that form within the bio-film ensure the media delivers optimum levels of biological filtration in the moving bed, which has been proven filtration technology for many years in the fishkeeping hobby.
Use with PURE Pond products
Evolution Aqua also recommend using K+Media in combination with the PURE Pond and PURE+ Filter Start Gel to boost bacteria levels which in turn will stick to the media and speed up the maturation process even more.
Delivery and collection arrangements depend on the items ordered. For live fish, read our koi delivery guide and confirm the booking with us before dispatch. For dry goods and other items, see shipping and returns.
Firework Spectacular: free mainland UK delivery
Free mainland UK delivery is included with all ten numbered Firework Spectacular koi bowls. No delivery code is required. Delivery is booked with you before dispatch; contact us before ordering for Highlands, islands or restricted live-fish postcodes. Collection from Grimsby is also available by appointment. View the Firework Spectacular bowls. The standard delivery charges below apply to other orders unless a separate offer applies.
Shipping
At Elite Koi we understand the importance of receiving your items quickly. We shall endeavour to dispatch your items within 1 working day and same day if your order is received before 1pm. Orders are not accepted until you receive notification from us that the order has been fulfilled via e-mail. Our courier service is not guaranteed to be overnight due to some circumstances being beyond our control.
Dry Goods Shipped by Courier, 95% - 98% of all orders couriered are received the following working day however this is not guaranteed by our courier service provider, therefore Elite Koi do not and cannot guarantee Overnight service. If your item is required urgently please contact us prior to checking out.
Working days do not include Saturday's, Sunday's or Bank Holidays. i.e. if an order is placed on a Friday before 1pm, the item will be dispatched from us and collected by the courier. The item will not be delivered until the following Monday at the earliest and in some cases this could be the Tuesday.
Elite Koi do not ship any goods on Wednesday's, however if the item is needed urgently please contact prior to placing the order.
Please see below for our delivery methods and costs.
Dry Goods
Shipping costs added at checkout. Please contact us with any queries
Live Fish
Live Fish £30 per box overnight courier service. Live fish require conditioning to travel and Elite Koi will contact you to book the service for a convenient time for you to receive the Koi prior to Noon Wednesday & Friday
If your fish arrives damaged or deceased contact us immediately on 07561 804263.
Returns of Live fish cannot be accepted.
Returns
We hope you are happy with your purchases from Elite Koi however if you have ordered the wrong item let us know for an exchange. All Dry Goods can be returned within 30 days of the date of purchase provided they have not been opened or used. Should you wish to return an item which is unopened and unused please contact us within 30 days of the sale of purchase. We will then send you our return details.
Items damaged in the post should be reported to us within 48 Hours of receipt.
If you wish to return an item please use the "Contact Us" button at the top of page or call us on 07561 804263.
Please contact us for the postal return address.
Live Fish
If your fish arrives damaged or deceased contact us immediately on 07561 804263.
Returns of Live fish cannot be accepted.
