Evolution Aqua Nexus Eazy 200 Installation & Operating Instructions Manual page 2

Thank you for purchasing your Nexus Eazy™ filter.
We are sure you will be delighted with its perform-
ance. You should have already decided whether
your filter system will be pump or gravity fed. Please
go to the relevant section and read
thoroughly before installation.
The Nexus Eazy filtration unit has been designed
on the principles of minimum maintenance, high
performance and a compact foot print. This design
delivers optimum water quality by using the Kaldnes
Moving Bed ™ process.
Basic Operation Nexus:
This section briefly explains the basic operation of the
Nexus filtration system. Water is delivered to the inlet
of the filter and enters chamber A (see fig. 15). This
chamber is the main mechanical stage of the filter.
All of the solids and debris are
stopped in chamber A and are
sumped to waste via a 1.5 inch
ball valve provided. The water
then passes to chamber B con-
taining the kaldnes Moving Bed
where the biological filtration takes
place. The air ring at the base of
chamber B constantly agitates
the media. Chambers C & D are
empty and allow the clean water
to return to the pond.
Basic Operation Eazy :
The Eazy™ is a stainless steel ves-
sel containing a volume of static
K1 media which is located within
the centre chamber of the Nexus.
Water enters the centre chamber
and then enters the 'Eazy' via slots
in the lower half of the unit. This
results in a downward flow causing
many of the larger solids to settle
out prior to entering the Eazy. The
size of the slots will not allow large
mechanical waste to enter the
cylinder thus acting as a first stage
mechanical filtration. The water
then passes through the static K1
media, utilising up and side flow
and this process causes the fine
solids to become entrapped. The
mechanically clean water then
passes to the outside chamber of
the Nexus where the Kaldnes mov-
ing bed™ is located for biological
treatment, prior to being returned
to the pond.
Nexus Eazy Specifications and Flow Rates
Follow your relevant section carefully and your filter
will perform correctly providing a perfect environment
for your Koi. One of the factors that can have a sig-
nificant 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. On Nexus ponds a turn over of every 2
to 3 hours is found to be best.
Nexus Eazy 200
Max flow rate:
Max pond size:
Kaldnes K1:
692 D
10,000 litres/hr
2,640 US gallons/hr
18,000 litres
4,800 US gallons
50 litres (for bio stage – max
150 litres possible)
30 litres (for Eazy – max 30
litres possible)
766.5
425
189
1250
Nexus Eazy Rev. 1.04
2,200 UK or
4,000 UK or
max water level
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