Late May I completed the work on the pond expansion. I originally was going to work on the upper pond first but decided for my own pleasure and enjoyment to complete the lower one first. This gives me immediate satisfaction of being able to watch my Koi grow from the deck. I also scaled back my original plan due to technical issues with the retaining walls. Removing too much dirt on each end would weaken the supports and could cause a collapse. These two pictures show work in progress and the completed lower pond.
Here is a summary of the technical specifications.
Upper Pond
The upper pond is a dual level design with a 6” depth section for plants and other critters. Overall size is approximately 12’ x 6’ with a max depth of 3’.
Total volume running is 937 gallons.
Lower Pond
The lower pond has been dug out and new liner installed. Overall size is approximately 18.5’ x 5.1’ and is about 3’ deep.
Total volume running is 2118 gallons.
Total pond volume including filtration system is 3105 gallons or 12.94 tons.
Filtration
The total system comprises of three filtration systems on two pumps. Two pumps and filters are used in case of failure. There will be no scrambling trying to maintain flows and oxygen levels.
First System
Cyprio BioForce 2000 UV 9W with 4 Matala pads and biological media
Titan 1050 GPH submersible pump, 1¼” tubing
System pumps from lower pond through the filter and discharges into the upper pond directly.
Second System
Savio 24” Waterfall Filter with 2 Matala pads and 200 bioball media
Hayward 180T sand filter with 3mm sinking pellet media 2 Cu. Ft.
Cal Pump 36W UV Clarifier
Laguna Max Flow 2900 GPH submersible pump, 1¼” tubing
System pumps from lower pond directly to the sand filter. Clean water flows to the UV Clarifier and then to the Savio waterfall biological filter.
An Alita 40 Air pump with 9” bubble disk assists with oxygenation
Chemistry
Pond initially filled with municipal water and treated with Amquel plus per instructions to detoxify chlorine and chloramines.
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