As the Nexus now runs into it's 8th year and the latest model is launched for 2010 we have decided to take a look back over the last 8 years and see where the changes have been made.

nexus 200 & 300

The Nexus has always been a dual filter providing both mechanical and biological filtration to the pond, however over the years it seems to have been the way the mechanical filtration is provided that seems to have seen a major change.

The Nexus 200 and 300 were a familiar method which is still used in many filters today. Sponges/Foams. A large Cylinder foam which simply fitted into the central chamber of the nexus this was called the central cartridge foam. There was also a second foam, a thin rectangular one that was flat to one side and had a corrugated effect to the other, This was known as the Final Exit Sponge, this also was replaced at a later stage.

Both of these sponges/foams are still available from us for those customers who have an Original Nexus 200 or 300.

Ofcourse the biological filtration has always proved to work in a way that was expected and respected, it did the job from the start and still continues to do so even in the latest model of Nexus, K1 Kaldnes Floating Media.

nexus 2000 & 3000

The arrival of the Answer 325 and 410 saw away with the original Central Foam Cartridge and also the Final Exit Cartridge Foam was replaced by the fines polisher with air backwash. This was the upgrade of the nexus 200 and 300 to the nexus 2000 and 3000.

The Answer was now the new mechanical stage of Nexus filtration. and actually with all honestly we still have requests today for customers who want to incorporate the Answer into their existing Nexus or vortex system thanks to the recommendation of those customers who had or still have the Nexus 2000 or 3000, unfortunately it has now been withdrawn from the market as the times move on.

What was the Answer?

The answer was a mechanical self backwashing screen which was low maintenance and would run for weeks before having to be cleaned. When incorporated into the Nexus the ultimate in pond filtration was found, providing outstanding water quality and clarity.

The Nexus 2000 and 3000 was one of Evolution Aqua's most established filter systems incorporating the industry proven Kaldnes moving bed coupled with the new recognised "Answer" mechanical filter and the new fines water polisher with air backwash.

200 & 300

The Nexus Eazy saw out with the Answer and in with the Central Eazy modification.

The Eazy is a stainless steel vessel which contains a volume of static K1 media which is located within the central chamber of the Nexus Eazy.

The Eazy has been designed with slots in the bottom half of the unit which results in a downward flow causing many of the larger solids to settle prior to entering the Eazy.

Many customers overlook when selecting a filter system the full cost implication of one system over another. Here are some of the other cost benefits, which maybe experienced by selecting the Nexus system.

Nexus saves money:

• Massively reduced costs due to a smaller excavation area and construction of filter house in gravity fed applications
• No expensive interconnecting pipe work between multiple filter bays
• Minimum water usage through maintenance (heating and purification of replacing water can be a large cost)
• No need for 4 inch slide valve as there is an integrated valve
• All ball valves and connecting fittings are included with the Nexus
• To increase the biological filter performance at a later date simply add more Kaldnes media instead of buying a new filter system
• The Nexus filter is designed to last
• Improved water quality can lead to less risk of fish losses

Main Benefits:

• Superb water quality and clarity - healthier fish
• Uses scientifically and time proven fish farming and waste water treatment technology for bio-filtration - healthier fish
• Zero maintenance at biological stage resulting in no loss of bio-mass, giving consistent performance - healthier fish
• A biological capacity that can grow with your fish, just add more Kaldnes media - healthier fish
• Can be upgraded to accept the revolutionary Answer mechanical filter - healthier fish
• Can be gravity or pump fed
• Massive performance from a small footprint
• Easy to install, includes all valves and fittings
• Comes complete with adjustable connectors on both inlet and outlet valves
• Sculptured and robust 1 piece moulding
• Unparalleled value for money

Levels of Kaldnes K1 within the Nexus

Kaldnes K1 has been proven in fish farming with feed rates up to 1.5kgs of 40% protein food per 100 litres of media per day. Evolution Aqua is rating it at a maximum of 0.5kgs of food per 100 litres used in order to ensure the best possible water parameters are achieved. If a higher feed rate is required, extra media can easily be added.

Koi are typically fed at between 1% - 2% of body weight per day. Therefore, for every 5gms of food fed, a litre of K1 media is required. At Evolution Aqua, the filter designs are based on the higher rate of 2% per day.

SKU	Description	Price
Nexus-CFC-01	Central Foam Cartridge - For NeXus 200/300	£42.51 + Vat
Nexus-FBC-01	Foam Block for Exit Chamber on the NeXus	£10.17 + Vat

 
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Below you will see the links to the various sections on this very large subject covering all the
type of Filtration Systems we recommend.