Description

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.
The Nexus 220 and 320 feature a re-designed Eazy filter which now 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 this combination of filter media work to deliver crystal clear and healthy water. All Nexus filtration systems can be installed on pump fed or gravity fed setups depending on your pond configuration. The Nexus 220 is suitable for ponds up to 18,000 litres (4,000 gallons) while for larger ponds the Nexus 320 can be installed on ponds up to 34,000 litres (7,500 gallons).
Specifications

Dimensions


How the Nexus Works
Water from the pond enters the nexus via the inlet into the inner chamber hich works as a vortex allowing larger solids to settle out. Water then passes through the grills in the stainless steel “Eazy” filter, where the finer particles are removed at the mechanical stage of filtration, thanks to the static bed of our award winning K1 Micro® filter media.

The mechanically clean water then passes to the outside chamber of the nexus where the K1 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 protected surface area of each piece of the K1 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.
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.


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).


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 the Eazy through all sides and from below, much more effectively than before. This feature combined with the use of K1 Micro makes for improved flow rates through the entire mechanical filter stage.
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 220 and 320 systems. The Eazy is simply cleaned by using a combination of the cleaning pipe, air valves and ball valves fitted to the Nexus, meaning you don’t need to get your hands dirty. The clear lid fitted to the Eazy also makes it easy to visual inspect the K1 Micro media.
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 with the K1 Micro in place. This added feature is ideal when undertaking further maintenance.
Flow Rates
One of the factors that can have a significant influence on the 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.
Overview of Nexus Automatic System
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.
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.
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.
- 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.removed if needed with the K1 Micro in place. This added feature is ideal when undertaking further maintenance.
Frequently Asked Questions
The water level in the outer chamber is much lower than in the inner chamber. Why?
- 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 needs cleaning. Or the Eazy’s steel screen needs cleaning. Beware of sharp edges!
What size pump do I need?
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 when you turn them down.
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 Nexus have/need?
The Nexus 220 comes with 18 litres of K1 Micro in the Eazy (inner chamber,) and 50 litres of K1 in the outer chamber.
The Nexus 320 comes with 20 litres of K1 Micro in the Eazy (inner chamber,) and 100 litres of K1 in the outer chamber.
For older models, the 300 and 310 contained 40 litres of K1 in the Eazy, and 30 litres for the 200 and 210.
Don’t change the amount of media in the Eazy as this affects particle capture, and ease of cleaning. The amount of media in the outer chamber can be increased however by up to 150 litres in total in the 220 and 300 litres in the 320 models.
Only increase the amount of media in the outer chambers for heavy stocking and heavy feeding. Note that if the total volume of media is increased in a newly set up filter it will take longer to mature, as there is more surface area for bacteria to colonise and the biofilm will be more thinly spread.
K1 Media can be purchased from your Evolution Aqua dealer, code MEDIA25L for 25 litres, and code MEDIA50L for 50 litre bags.
Do I need an airpump for Nexus?
Yes, it powers the moving bed biological filter and is also vital to the cleaning process. You need an Evolution Aqua airpump 75 for a Nexus 220 and an airpump 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 airpump to enable K1 Media to move is detailed in the below:
50-75 litres airpump
75 75-100 litres airpump
95 100-150 litres airpump
130 150-300 litres airpump 150
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 it means total hands-off cleaning. The more your filter is cleaned, the more that waste is removed from the system before being broken down. That means a cleaner pond, cleaner filter and healthier water.
The Automatic System can be fitted to all Nexus models manufactured after 2006, and both gravity fed or pump fed models. It can be fitted by the user or a pond filter installer. The Automatic system still requires a Nexus, airpump and a water pump, along with a power supply. During cleaning the Nexus will expel dirty water to waste, so an auto top-up fitted to the pond (not supplied,) is advised if the filter is set to clean frequently.
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 difficult to retro fit as the hole is quite tight, you may find it easier using 110mm soil pipe as this has a slightly smaller outer diameter.
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 litres / 140 UK gallons / 168 US gallons
Inner chamber 205 litres / 45 UK gallons / 54 US gallons
Waste 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.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Refund Policy
Exchange and Refund Policy
Coastal Pets endeavors to bring you high quality, economical products at the best level of service possible.
Our business is run in compliance with the Consumer Protection Act and our exchange and refund policy is therefore based on it.
Returns in case of Change of Mind or Mistake by Consumer
In the event of consumers wanting to return goods because they have changed their minds or purchased the incorrect product due to an error or mistake on their part, we are not obliged by law to accept returns and refund monies. However, where we choose at our sole discretion to accept such returns and refunds out of goodwill, such goods must still be in their original condition and packaging and may not have been used. You will also be required to present the original invoice.
CAREFULLY READ THE INDICATIONS OF PURPOSE AND OTHER NOTICES TO FAMILIARISE YOURSELF WITH THE USE FOR WHICH THE GOODS ARE INTENDED BEFORE PURCHASING THEM
Should you wish to return any item purchased that is qualified and approved to be returned, please log a service email to us on support@coastalpets.co.za, with the original invoice and all the packaging and accessories. Coastal Pets will not be liable to collect the goods from you that have been delivered to you for any reason whatsoever. We will not be held responsible for any costs that may be incurred by you as a result of returning the product. This includes, but is not limited to, loss of income, loss of revenue, or any travel expenses.
HILL'S 100% GUARANTEE POLICY
Hill's is 100% guaranteed for quality, consistency and taste, or your money back.
https://www.hillstransforminglives.co.za/money-back-guarantee
Are any goods excluded from this return and refund policy?
By law, the goods we exclude from the returns and refund policy are:
-
goods which are not inherently unsafe, there is no material defect in the goods, or the goods have failed while being used contrary to instructions or not for the indicated intended purpose;
-
goods we do not ordinarily stock and have been purchased by way of special order will only be replaced if defective;
-
goods which have been partially or entirely disassembled, physically altered, permanently installed, affixed, attached, joined or added to blended or combined with, or embedded within, other goods or property (including changing plugs, extending cords, or unscrewing any fastener;
-
goods which have been intentionally or unintentionally damaged by the consumer, for example, by exposure to the elements, use of force on the product to replace batteries and other consumables, or used commercially when sold for domestic use only.
-
goods considered "livestock" and all foods. This excludes DOA. (dead on arrival)
-
gift vouchers and coupon codes.
DOA (Dead on arrival)
DOA of livestock will be refunded through vouchers/credit notes or the order will be resent at no cost to the client. A photo should be taken of the DOA stock upon arrival with a timestamp and sent to support@coastalpets.co.za. This will be cross referenced with the waybill delivery note.
Gift Vouchers and Coupons T&Cs
Coastal Pets may from time to time make physical or electronic gift vouchers (“Gift Vouchers”) and promotional coupons or discounts (“Coupons”) available for use on the Website towards the purchase of Delta Aquatics products. Gift Vouchers and Coupons can only be redeemed while they are valid and their expiry dates cannot be extended. More specifically:
Gift Vouchers
-
Gift Vouchers that are purchased are valid for 1 year after Sale. Gift Vouchers that Coastal Pets gives away for free are valid for the period stated thereon. In each case, if your Gift Voucher has not been used within that period, it will expire.
-
Gift Vouchers cannot be used to buy other Gift Vouchers or Coupons. They do not accrue interest and are not refundable for cash once purchased. If your Gift Voucher value is insufficient for the order you wish to place, you may make up the difference by paying via one of our other payment methods.
-
Coastal Pets is not responsible for any harm due to the loss, unauthorised use or unauthorised distribution of a Gift Voucher, after Delta Aquatics has delivered the Gift Voucher to you or the email address nominated by you.
Coupons
-
There are two types of Coupons: a Coupon with a fixed amount of a discount, e.g. R100 off (“Fixed Coupon“), and a Coupon with a percentage discount, e.g. 10% off (“Percentage Coupon“).
-
Coupons are issued at Coastal Pets sole discretion and we are entitled at any time to correct, cancel or reject a Coupon for any reason (including without limitation where a Coupon has been distributed in an unauthorised manner). Users do not have a right to Coupons, and Coupons cannot be earned. Coupons are issued under specific terms and conditions regulating when and how they may be used.
-
As a general rule, and unless specified otherwise on the specific Coupon itself:
-
each Coupon can only be used once;
-
only one Coupon can be used per order;
-
only one Coupon can be used on the website per person per promotion/campaign;
-
Coupons with a percentage discount offer may only be used on purchases with a total cart value specified;
-
a Coupon must be used at check-out – it cannot be used later on existing orders; and
-
the value of the Coupon will be set off against the value of your shopping basket and the balance remaining, if any, will be voided.
-
-
Coupons cannot be used to buy Gift Vouchers or other Coupons, and cannot be exchanged or refunded for cash or credit. Jungle Aquatics is not responsible for any harm due to the loss, unauthorised use or distribution of a Coupon.
-
If for any reason a Coupon does not reflect in the final amount due from you at check-out, please contact us to confirm if the Coupon is still valid. If Coastal Pets confirms that the Coupon is still valid and you have already placed your order, you can choose whether to cancel the order and place it again with the Coupon, or you can use the Coupon on your next order within the limitations of the specific Coupon’s terms and conditions.
-
You may be required to submit the original communication containing the Coupon code, and any other information reasonably requested by Delta Aquatics, before you are able to use a Coupon.
What if the goods are unsuitable for the purpose I initially bought them for?
-
As stated above, it is the consumer’s responsibility to familiarise themselves with the intended purpose of any goods stated on the packaging and there is no right to return any goods because they are unsuitable for another purpose than that stated on the packaging and in user documentation;
-
If however you indicated a particular purpose for which you intend using the goods to a salesperson who confirmed in writing e.g. on a quotation, that you will be able to use the goods for that purpose, you may return the goods within 2 working days after you purchased them if it turns out that the goods are not suitable for the purpose you anticipated and indicated to the salesperson.
-
Subject to our rights in law to charge you for use and to get the goods fit for re-stocking, we will give you a refund in credit form.
What can I do if the goods are defective?
-
If your goods turn out to be materially defective within the first 6 months after you received them from us, we will repair them, replace them or give you a refund in credit as per the suppliers warranty and limitations.
-
Due to the technical nature of most of the goods we sell, it is not possible to determine in-store whether goods have been damaged or what the cause of a failure or defect may be. This is of importance as it determines whether the goods may be repaired, replaced or refunded under warranty. Accordingly, we reserve the right to refer returned goods for technical assessment by the manufacturer or authorized service centre prior to repairing, replacing or refunding and to provide you with feedback within 30 working days of receipt of the returned goods and to act accordingly.
-
If the goods fail or a defect manifests after the initial 6 month period from the date of sale thereof, in most cases the normal manufacturer’s warranties will apply as stated in the documentation provided with the goods, however, these are not guarantees offered by us and all decisions, repairs, replacements and refunds are undertaken by the manufacturer or importer at their discretion and all complaints in respect thereof should be directed to them.
-
If the goods become defective once the manufacturer’s warranty has expired, we can in most cases arrange with the manufacturer or its agents to repair them. No repairs will be done without you approving a quotation first.
Are there any conditions that apply to manufacturers’ warranties?
As with all warranties, certain conditions and exceptions apply.
-
Please take proper note of any terms or instructions that accompany your goods and make sure that all instructions are strictly followed as a failure to do so will result in the warranty being voided. This is applicable to all goods, but especially for electronic appliances.
-
Goods that show a manufacturing defect within the first 6 months of purchase will be repaired, replaced or refunded at the suppliers discretion.
-
Defects that develop after 6 months may be repaired, replaced or refunded at the manufacturer’s election, and subject to the relevant manufacturer’s policy or extended warranty.
-
The nature of the goods (size, technical specifications, etc.) often dictates where the repair will take place. For example, on site or at the manufacturer’s premises.
In what instances will the manufacturer’s warranty not apply?
The manufacturer’s warranty will only apply to defects in the process of manufacturing the goods and will not apply in the following instances:
-
damage caused by lightning or power surges.
-
goods used for a purpose other than the purpose for which they were manufactured.
-
goods used contrary to their instruction manuals, such as misuse or abuse of the products
-
accidental damage.
-
Goods that have been partially or entirely disassembled or physically altered.
How will I be refunded?
Once we have accepted a return and approved a refund, you will receive the refund in the form of store credit. Should we under certain circumstances be required to issue a refund in full (no store credit) this is done in strict compliance with the CPA and proper customer identification (copy of ID), including an official Proof of Bank Account Letter and proof of original sales receipt will be required to action the refund in full in the form of EFT.
Please note that we only refund to the payment method that you originally used – i.e. payment by credit card will be refunded to the same credit card, payment by Cheque/Savings and EFT or COD (cash on delivery) will be refunded to your nominated bank account. A Proof of Bank Account Letter is required to action an EFT.
Repaired Goods
There is an implied warranty on goods repaired out of warranty, which places an obligation on suppliers to warrant all new and reconditioned parts installed, for three months, in all repair work undertaken after the date of installation or longer, as the supplier may specify. Please note that we are not the repairer’s of any goods brought in to us for repair and this warranty is between you the consumer and the service agent or service centre although we will as far as is reasonable assist you in dealing with them.
Delayed Delivery
Where goods are ordered online, or through our shops and have to be obtained for you or sent to you or anyone else, we cannot accept cancellations or offer refunds merely because there were delays outside our control in the obtaining of the goods or delivery thereof by the delivery service provider.
If time is of the essence then please inform us at the time of placing of the order so that we are aware thereof and can inform you of the possibility of meeting your expected due dates.
How do I return a product to your store?
If you are unsatisfied with your purchase, and meet the above disclaimer on returns, and only where we have approved a return, or if the item was received faulty/defective/broken/damaged in transport and/or wrongly delivered by us, please get in touch with us within 24 hours after your delivery through support@coastalpets.co.za, or by phoning the customer support desk on 041 364 0787. A consultant will explain the return process to you and if required we assist in booking a return via courier from our side (costs apply). In the event of a warranty claim, damaged goods or a mistake from our end, the courier service will be free of charge where applicable. If you however ordered a product that you no longer wish to keep, and meet our conditions for return and only after we approved the return, a courier and handling fee will apply (calculated upon processing your return and communicated with you prior to booking the courier), alternatively you have the option to return items not qualified for a free return with your preferred courier. Please send to our Retail store: Coastal Aquariums & Pet Supplies, Unit 2, 172 Circular Drive, Lorraine, Port Elizabeth.