The first thing that strikes you
when you enter this garden is the amazing views from the surrounding
hills, then on the patio close to the house you see the pond
which was completed March 1993. The pond is a large rectangular
shape with about two feet above ground and it is six feet in
depth.
The base is twelve inches thick
and includes two bottom drains connected directly to the drain
box with 4ins piping. The base has steel reinforced mesh and
is benched so that the solids are directed into the drains.
The walls are built direct on to the base in the
normal way and are made of standard concrete blocks 18ins x 9in
x 4ins laid flat on their sides to make a nine inch wall. The
blocks have not been rendered on the inside, but were covered
with 1" thick polystyrene sheeting. This was stuck to the
blocks using polystyrene cement and joined together with tape.
Measurements were then carefully
recorded and a butyl boxed liner was then purchased and fitted
correctly into place. The polystyrene sheeting is intended to
insulate the walls of the pond, and should also prevent damage
to the fish as the liner does give some movement when depressed.
The filter system is situated right along the
long length of the pond and is very large in relation to the
surface area of the pond. These are constructed of concrete blocks
and are rendered with Fibromix, and painted with G4 (black).
Also incorporated into the system is a Vortex chamber which was
cast in concrete instead of using the usual fibreglass component.
The top of the filters are covered with wood and
can be used for sun-bathing whilst watching the fish.
The water is taken from the pond from mid water using a four inch pipe and
this flows directly into the Vortex chamber, and then into the four chambers
of the filter. The second bay is now planted up with watercress, and acts as
a vegetable filter.
At the end of the filter system
there is another bay and this serves as a pump chamber. At present
it holds both the pumps and the U.V. filters, but has been designed
so that it is large enough to take a swimming pool sand filter
later if Louis decides to fit one. The very large pump is a Grundfoss
50/60 and the rated output on the three speeds are 3900, 4800,
and 6100 gallons per hour. This is one of the very few ponds
in the section where the mid water return works successfully
with plenty of bubbles at 3ft depth.
Pond
details
Gallonage
Dimensions
Construction
Shape
Bottom drains
Filter feed
Year completed
Time to complete
8,200 total.
18ft x12ft x 6ft deep.
Concrete blocks, polystyrene, butyl liner.
Rectangular.
2 x 4ins.
Mid water - 4ins pipe to Vortex..
April 1993.
4 months
Filter
details
Gallonage
Type
Media Bay 1
Media Bay 2
Media Bay 3
Media Bay 4
Settlement chamber
Aeration
1,800.
4 bay built with concrete blocks.
Flocor.
2,500 nylon pot scourers.
Perlag.
16 grade canterbury spar
Vortex chamber 36" diam x 42" deep.
None
Pump details
Type, make, etc
Pumping capacity
Location
Water return
This website started with a
booklet which I made up originally for the help of those members of the BKKS
- South Wales Section who were intending to start building a koi pond, and as the website has expanded more information and articles from other people have been included. This
is for general guidance only, and we do not take any responsibility for problems
that might occur by following these ideas. It is important
that you check out everything in your area, and check on local laws and rules
that may apply.
