Evolution Aqua Nexus Eazy 200 Installation & Operating Instructions Manual page 7

3
Close off the feed to the
biological chamber by
inserting the isolation pipe
into the centre of the
"Eazy", ensuring that the
rubber flange engages
within the Nexus centre
spigot (Fig.23).
4
Close the inlet to the Nexus by
using the inlet slide-plate sup
plied with your Nexus. You
should now have isolated
your "Eazy" from the system
(Fig.24).
5
Open the air valve
until the Kaldnes
in the "Eazy" is boil
ing.
Fig. 25
6
After the "Eazy" has been boiling for a minimum
of one minute, open the valve to waste drain
from the central Nexus chamber.
7
Once central chamber has drained, close waste
valve.
8
Remove the Isolation pipe
9
Close the airvalve.
10
Remove the Nexus inlet slide-plate allowing the
nexus to refill.
11
Restart the circulation pump.
Cleaning Pump Procedure
1
Close single union ball valve on inlet
pressure line (supplied)(Fig.26).
2
Close off the feed to the biological
chamber by inserting the Isolation
pipe into the centre of the "Eazy",
ensuring that the rubber flange
engages within the Nexus cen
tre spigot.
3
Re-open inlet valve until the water
level within the Nexus central chamber is level
with the overflow, close inlet valve. It is essential
that this water level is maintained to allow
efficient cleaning.
4
Switch off the pond pump.
5
Open the air valve until the Kaldnes in the "Eazy"
is boiling.
6
After the "Eazy" has been boiling for a minimum
of one minute, open the valve to waste drain
from the central Nexus chamber.
7
Once central chamber has drained, close waste
valve.
Fig. 23
Fig. 24
Fig. 26
8
Remove the Isolation pipe
9
Close the airvalve.
10
Open inlet valve.
11
Restart the pond pump.
Kaldnes Moving Bed™ Process
Kaldnes Moving Bed™ process, has been scientifically
tried and tested in fish farming and waste treatment for
over 10 years.
Illustrated above are the different stages of maturity
that will be experience during the first few months.
Developed by Professor Halvard Ødergard at Trondheim
University of Science and Technology the Kaldnes
Moving Bed™ bio film process has been designed
specifically to create the most effective environment
for the nitrification process to take place. The media is
engineered in a wheel shape and is slightly positively
buoyant, allowing a small amount of water flow created
by adding air to the process) to circulate the media
throughout the vessel.
Oxygen and food (ammonia and nitrite) gives the bac-
teria the means to grow, whilst the Kaldnes media pro-
vides maximum surface area for the bacteria to colonise
and produce bio film. It is this process, which removes
harmful ammonia and nitrite from the water. As the
Kaldnes media chaotically circulates within the bio tank,
it causes old dead bacteria/bio film on the outside, to be
removed making space for new younger heavier feed-
ing bacteria/bio film to colonise. Within the wheel, is a
protected surface, which enables colonies of bacteria to
naturally follow their life cycle, maturing and dying, in turn
fuelling the latter stages of nitrification conversion proc-
ess. It also assists in the breakdown of any small particles
passing through from the mechanical stage. Therefore,
the Kaldnes media maintains both a young biofilm & a
maturing bio film providing a more consistent filter per-
formance, whilst improving water quality, encouraging
healthier Koi and aiding in reducing green water and
blanket weed. Due to chaotic movement of Kaldnes K1
media, the process is self-cleaning and requires no main-
tenance. This allows the filter to reach optimum effective-
ness without the disturbance of periodic maintenance,
avoiding unnecessary loss of bacteria within the filter
preventing high levels of ammonia and nitrite within the
water. The other major benefit of Kaldnes K1 media is the
huge 'active' surface area available for the bacteria to
grow on compared to other types of media. This feature
allows for smaller filter design, e.g. the Nexus, whilst provid-
ing increased biological efficiency.
How it all works
Maturing the Kaldnes bio-media is important. The
maturing process needs monitoring closely to ensure that
levels of pH, ammonia and nitrite are within acceptable
parameters for your fish. Usually, within 2 - 10 weeks the fil-
ter will be effective and the parameters should be within
Nexus Eazy Rev. 1.04 page 7