Once your Nexus is installed and plumbed in as described above, you are ready
to fill the Nexus and begin treating your pond water.
To fill your Nexus first you need to open all your valves before and after the
Nexus. With a pump fed unit you then need to switch on your pump making sure
that the flowrate is not too fast (refer to the section below). A gravity fed system
will just fill until it reaches water level.
Once the Nexus is full, you will notice that
the Kaldnes K1 media is positively buoyant
and floating on the water surface. In a
pond containing fish the media can attain
neutral buoyancy in 2-3 hours while in a
newly filled and stocked pond it can take
up to a week for this to occur. For people
installing a Nexus on an existing pond, the
Kaldnes K1 media can be primed before
use, by soaking it in pond water prior to
installation.
When your Nexus is full it is time to turn on your airpump to circulate the media
making sure the valve to the outer chamber (bottom valve) is open and the
valve to the Eazy (top valve) is closed, as per figure 10. Once your media
has achieved neutral buoyancy it will move and circulate around the outer
chamber as shown in Fig 11.
Importance of Flowrate
The flowrate through your Nexus affects
how your Nexus runs in two different
ways. You will visually notice straight
away that the levels in both the inner
and outer chamber will run at different
heights depending on the flowrate.
Because of this the flowrate also helps
determine the interval between when
the Eazy needs to be cleaned though
this is mainly dependant on the type of
food you are feeding and the amount
of algae in your pond.
The flowrate of your pump can be adjusted by slightly opening or closing the
valve after your pump. For Gravity Fed systems if the level in the outside chamber
is dropping (when your eazy is clean) your flowrate is too fast and needs to
be slowed down. While with Pump fed systems, if your inner chamber level is
rising quickly (when easy is clean) and overflowing into the outer chamber your
flowrate is too fast.
GETTING STARTED
-8-
Fig 10
Fig 11
