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20 Jul 2020

How Does Nexus Koi Pond Filter Work?

Posted By : Guest

Filed Under : Koi Pond | Evolution Aqua

The Evolution Aqua Nexus is considered as one of the most state-of-the-art pond filtration systems that is readily available in the industry today and has since created quite the hype amongst both hobbyists and professional pond owners.

It's system utilizes a heavy-duty mechanical filter that comes in the shape of a stainless steel grill container. It is also equipped with a mechanically-aided biological filter that keeps your water in the filter flowing to make sure and give assurance that any nitrifying bacteria gets working on the high volume of ammonia in the pond.

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.

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).

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 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.

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.removed if needed with the K1 Micro in place. This added feature is ideal when undertaking further maintenance.