Nexus automatic
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Make Nexus the automatic choice

Continuing our long standing reputation for innovation, the Nexus Automatic System now enables Nexus owners to benefit from a fully automated cleaning cycle on their multi award winning Nexus filtration systems. Physically turning ball valves and manually switching pumps on and off will now be a thing of the past thanks to the Nexus Automatic System. All of the key processes that form the cleaning cycle are now controlled automatically with this easy to install kit.

Gravity Fed Setups

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Pump Fed Setups

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Overview

The Nexus Automatic System can be installed on Nexus 220 and
320 filters manufactured after 2006, whether on gravity-fed or
pump-fed installations.
The kit includes a control box which connects up to an automated
waste valve, airpump control box and an automatic inlet slide plate
(for gravity fed models only). Once installed and connected to your
pond pump and mains power the system will carry out cleaning
cycles at timed intervals or when pressing the manual clean button.

Useful Information

FAQs: provide answers to the most frequently asked questions. Start typing the product name + your questions in the search box. Or click here to access the FAQs databse.

Nexus Automatic Manual

Nexus Automatic Manual

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Cleaning Cycle

The Nexus Automatic System will control the cleaning cycle fully automatically. Cleaning is done on a timer, which is factory set to clean once every 3 days, however, this is easily adjustable to fit in with your pond requirements. The Nexus Automatic System will run a cleaning cycle which lasts approximately 10 minutes.

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Gravity Fed Cleaning Cycle

■ Adjustable timer kicks in to start a cleaning cycle.

■ Control box automatically switches circulating pump off.

■ The water level in the Nexus equalises.

■ Inlet valve closes whilst at the same time air is diverted from the outer bio chamber to the EAZY to clean the media.

■ After the media has been cleaned, the waste valve opens.

■ EAZY is drained to waste and inlet valve opens for a final flush of the EAZY.

■ The waste valve closes.

■ Air is diverted back from the EAZY to the bio chamber.

■ Circulating pump is switched back on.

■ Nexus returns to filtration mode.

Nexus Auto
Nexus Auto

Pump Fed Cleaning Cycle

■ Adjustable timer kicks in to start a cleaning cycle.

■ Control box automatically switches circulating pump off.

■ The water level in the Nexus equalises

■ Air is diverted from the outer bio-chamber to the Eazy to clean the media.

■ After the media inside the Eazy has been cleaned, the automated waste valve opens.

■ Eazy is drained to waste.

■ The automated waste valve closes.

■ Air is diverted back from the Eazy to the biochamber.

■ Circulating pump is switched back on.

■ Nexus returns to filtration mode.

Nexus Auto

The generally accepted practice is that when you keep ornamental fish, whether in a pond or in an aquarium, to keep the water fresh, 10% of the volume of the water in the pond/aquarium should be changed on a weekly basis. With this in mind, we recommend that you set your Nexus Automatic system to run a cleaning cycle so as to exchange water in line with this.general parameters of our ponds is turn over rate. This is the time that it takes for the total volume of the pond to pass through the filter system once. We recommend that for ideal performance a turn over rate of every 2 to 3 hours is found to be best.

Frequently Asked Questions

Nexus Automatic
Why is the water level in the Nexus outer chamber much lower than in the inner chamber?
• The pump could be too powerful, so the Nexus+ is being emptied before the pond refills it by gravity. • There could be a blockage in the transfer port between the inner and chamber and the outer chamber. You need to back flush it. You can download the instructions to backflush here. • The Eazy...
What size pump do I need for my Nexus?
Maximum recommended flow on the 220 is 10,000lph and the 320 is 13,000lph, however suggested flow rates are lower. Slower is better for fine removal and clearer water. Aim to turn over your pond volume every two to three hours. The Evolution Aqua Varipump range are adjustable, and consume less energy...
Can Nexus+ be gravity or pump fed?
Yes, it can easily be adapted to either filtration method by simply swapping the supplied rubber boots.
How much media does NexusPlus have/need?
The Nexus 220+ comes with 18 litres of K1 Micro in the Eazy (inner chamber,) and 50 litres of K+Media in the outer chamber. The Nexus 320+ comes with 20 litres of K1 Micro in the Eazy (inner chamber,) and 100 litres of K+Media in the outer chamber. For older models, the 300 and 310 contained 40 litres...
Do I need an airpump for NexusPlus?
Yes, it powers the moving bed biological filter and is also vital to the cleaning process. You need an Evolution Aqua Air Pump 75 for a Nexus 220 and an Air Pump 95 for a Nexus 320. If you increase the amount of media in the outer chamber you may well need a more powerful airpump. The correct size ...
How does the Nexus Automatic Control Box work?
Understanding the Nexus Automatic Control Box Video This video will show you how the Nexus Automatic Control Box works. This will help you to troubleshoot any issues you may have encountered along side our other troubleshooting videos for the Nexus Automatic.
How does the Nexus Automatic Air Control Valve Box work?
This video will show you how the Nexus Automatic Air Control Valve Box works. This will help you to troubleshoot any issues you may have encountered along side our other troubleshooting videos for the Nexus Automatic Control Box.
How does the Nexus Automatic Inlet Plate Relay work?
This video will show you how the Nexus Automatic Inlet Plate Relays work. This will help you to troubleshoot any issues you may have encountered along side our other troubleshooting videos for the Nexus Automatic Control Box.
How does the Nexus Automatic Waste Valve Relay work?
This video will show you how the Nexus Automatic Waste Valve Relay works. This will help you to troubleshoot any issues you may have encountered along side our other troubleshooting videos for the Nexus Automatic Control Box.
How long is the standpipe for the return in a Nexus+ that is pump-fed?
The return pipe is 40.5cm long in the 220 and 46cm long in the 320. This is a length of 4" pressure pipe which is factory fitted during production to the return chamber of the Nexus and sets the level of the water in the Nexus. It is removed when using the Nexus in a gravity fed pond. This can be quite...
How much water is in the Nexus+?
Nexus 220+ Total volume of water 510 litres / 112 UK gallons / 135 US gallons Outer chamber 405 litres / 89 UK gallons / 107 US gallons Inner chamber 105 litres / 23 UK gallons / 28 US gallons Nexus 320+ Total volume of water 840 litres / 185 UK gallons / 222 US gallons Outer chamber 635...
My Nexus is not draining to waste when valve is opened.
Remove the outside union on the waste ball valve, open the valve, if no water pours out the blockage is under the Nexus, carefully push a suitable stick (such as a cane) and release the blockage, you can also remove the Eazy and access the pipe from the 1.5" hole in the bottom of the Nexus inner chamber...
The inlet valve does not turn on my Nexus during a cleaning cycle.
Check if the inlet valve is being obstructed. Check if the yellow light is illuminated. If light is not illuminated after 3 minutes, initiate a manual clean to check operation. Check the wiring is correctly installed. Seek advice from a suitably qualified electrician if in doubt. Check the mains...
How do I identify the spare part I need for my Nexus?
You can identify the spare part you need in the Nexus manual, the spare parts list is located on page 29. To view the manual, click here. Alternatively, you can identify the spare part you need from the image below.
K1 Micro is floating but K+Media is not in my Nexus, why is this?
The K+Media in normal conditions becomes semi-buoyant within 48 hours. However, the K1 Micro (only in the Eazy) takes longer to absorb water. This can take up to one week.
The K1 Micro in the Nexus Eazy doesn’t move well during the cleaning cycle
The reasons for this could be one of the following: The air pump is not powerful enough (see Air Pump Recommendation on page 4) There isn’t enough water in the Nexus – check that you used the cleaning pipe to maintain the level on a pump fed system. Check all air fittings and air line for leaks...
I am using a Nexus, my pond has been running for longer than 2 months and my water is cloudy, why?
It is important that the Eazy is flushed a minimum of 2 times during cleaning. This ensures that all the debris collected is flushed out to waste. If the unit is only cleaned once some debris can be returned to the pond, clouding the water. Flush the unit 2 to 3 times as per the cleaning instructions...
My Nexus is blocked with media/debris between the eazy and the main chamber
To clear the block you will need to drain down the outer chamber and clear the kiss points with a small flat screwdriver.You will then need to refill the filter, the media should float up so it can remove by hand.
Can I retrofit a Nexus
It is possible to retrofit a Nexus. However this cannot be done for an Eazypod.
My media is not circulating as good as what it was in the outer chamber of my Nexus.
You will need to check to see if your Airpump is working as it should be. The airline holes may have become blocked with limescale. To rectify this you will need to drain down the outer section and check the airline for any blockages.
How often do I need to change the media in my Nexus?
You should never need to change the media in your filter. You can add more to the outer chamber of your filter if required. Please see question 4 for more information before adding more.
How much water is drained to waste from my Nexus during a cleaning cycle?
In a Nexus 220+ 140 litres of water is drained to waste. In a Nexus 320+ just under 200 litres of water is drained to waste.
What is Nexus Automatic?
The Automatic is a separate system which can be fitted to Nexus filters, to enable automatic cleaning. By combining timers and automatic valves, Nexus can be converted and set to clean itself, as little or as often as required. It can be set to clean at night or while you are on holiday, and once set...
How can I extend the draining time of my Nexus Automatic?
You first need to remove the sticker of the far right side box and change the last dial with a small screwdriver from 50% to 40%, this will extend the cleaning time by one minute.
There is no power to the Nexus control box.
Check the wiring is correctly installed. Seek advice from a suitably qualified electrician if in doubt. Check the mains connection to the control box. Seek advice from a suitably qualified electrician if in doubt. Check the fuses inside the control box. These are located alongside the timer blocks...
How can I locate the fuse in the Nexus control box?
These are located alongside the timer blocks within their own hinged compartments. The fuses are all standard glass fuses; 10 Amp, 5 Amp, 2 Amp, 2 Amp from left to right.Please see the image below, this is where you can locate the fuses.
How do I set a Nexus Automatic to clean at a set time each day?
As its an analogue timer the cleaning frequency will be purely based on time so for example once every 24h, you can dictate the time by pressing manual clean at say 6pm and then it will automatically clean at 6pm the following day. On a twice a day clean you would need to set it to twice a day and then...
Nexus Automatic does not close waste valve
To locate the issue you will need to:Check the relay furthest on the right in the auto box -Check the fuse - Does it light up during a cleaning cycle?If the relay is working as it should, you will need to check the motor. If it’s under warranty you will need to report back to where it was purchased ...
How do I change the relay on an Automatic Filter?
<p>Watch the step by step video below to learn how to change the relay on an automatic filter.</p><p><iframe title="YouTube video player" src="https://www.youtube.com/embed/bTEkdTVnVnQ" width="560" height="315" frameborder="0"></iframe>
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Nexus Automatic Manual

Nexus Automatic Manual

Pond Brochure

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Nexus Spares

Nexus Spares

Nexus Automatic Manual

Nexus+ Spare Parts List

Dealer Locator