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These are 2 of my favourite photos taken in of my koi
my pond has a total volume of 16000L including the filters which are +- 2000L Average depth of 2m with a dished out bottom from 1.8m at the sides to 2.2m at the single central bottom drain
Extra features built into the pond are the use of an auto fill for top up and water changes, surface skimmer and algae scrubber in the raceway on the right hand side.
as you can see the pond is built right next to the house and the room has become my koi room with all the stuff that normally lies around creating clutter.
The pond has a flood light for night viewing and viewing from behind the glass door if the weather is bad.
All pipework is internally fitted, eliminating the possibility of leaks at the joints. This also allows the flexibility to allow for modifications without having to chop into concrete
Filtration is all concealed under the decking and is achieved by gravitational pressure with a single 18 000 l/h pump in the biological chamber which runs the bottom drain, surface skimmer, algae scrubber, UV Steriliser, Flume and 2 adjioning Guppy ponds which have been looped into the same system.
Additional airation is by way of a LP100 air blower which is connected to an airlift pipe at the raceway waterfall, an air ring in the biological chamber, 2 airlift tubes in the guppy ponds and also airlines to the baby koi ponds
Here is another view showing the guppy ponds which have been looped in. The green is Duckweed which is an excellent Nitrate consumer, It grows like crazy and all the excess makes an excellent feed for the koi in the main pond. It has a high protien content and contains Lutien which is a colour enhancer for the Koi
The decking is removed to show the filtration system
A very low tech filtration system has been designed for my pond.
It works very well, keeps the water crystal clear and costs very little to maintain
The filtration works as follows:
water is drawn by gravity from the Bottom Drain (1) and surface Skimmer (2) into the settlement chamber (3) through a baffle plate to slow down the flow of the large solid particles which settle in this chamber. Water then flows through the chambers using various different media for mechanical filtration. No(7) is high volume Bio bocks and then into aerated bio chamber (9) . some water is diverted to the UV Sterilizer (10) and re enters the system at No (4). The pump is at (9) and directs the water to the Flume (12) , raceway and algae scrubber (11) . Sometimes Activated Carbon is used at the end of the raceway to remove DOC's
Here's another view to show the raceway
Here is a pic of the setting up of my spawning tanks in December 2011. It was left a little late and I probably wont get the best growth on the babies but im using this as an experiment for next year when ill have set up a bigger facility for spawning and grow out
I tried using palm fronds instead of brushes as spawning media as it seems more natural and the palms remain green in the water for a long time. Hopefully they will also encourage infusoria growth around the leaves
I paired a female Kohaku (Tancho gone muji) with a male Sanke and Goshiki
Heres a pic of them Spawning. The Palm Fronds worked exceptionally well as there were hardly any eggs scattered on the floor, the leaves were almost completely covered with eggs
Once the fry had hatched and swam up I insulated the tanks and started a slow filtration with seeded media from my main filter ( It looks like an amakweta hut, i know, but its all for the good of the fish)
Filtration was very efficient as there was never any significant Ammonia to worry about and the duckweed is great at consuming the Resultant nitrates
Heres a pic of the fry at about 6 weeks old
These are the keepers from the first cull. there is a huge difference in growth rates and these are the biggest of the babies. Most of them are still only 3cm while the bigger ones are up to 10cm at 3 months old, The small ones still dont have any significant pattern so culling is based on size and body shape.
here is the beginings of next years breeding facility. A green house will have about 10 of the round vats for spawning and innitial growth. in the background is my mud dam
The mud dam is to have a buried liner (blue) to prevent the water from draining away
The mud dam didnt work cos as it filled up all the dirt slumped to the bottom, so its become a dam lined dam now. ive covered it with shadecloth for the winter as the huge overhanging pecan nut tree is gonna drop all its leaves and nuts into the dam
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