Do you really need a concrete garden pond
Concrete ponds are best reserved for large serious koi ponds or formal ponds where you personally lack some control eg in public places
You will notice I have not talked about concrete ponds. I mentioned earlier that concrete is quite simply the wrong material of construction for small garden ponds.
However if circumstances insist upon concrete being used as the shell for the pond then seek specialist advice. If you do go to the extent of using concrete and building a large and deep pond then make provision for installing a bottom drain in the pond. This allows the accumulating debris at the bottom of the pond to be continuously drained. Bottom drains and the piping design required add a further degree of complexity to your project.
By far the best information I have ever come across in the building of concrete ponds can be obtained by reading the series of articles published in Nishikigoi International magazine published in the UK by Nishikigoi International Ltd telephone UK +44-1942-77-78-79.
This company has an excellent koi dedicated web site at www.koimag.com . There is no other publication anywhere that covers koi keeping in the depths that this company does. Highly recommended.
Many people convert unwanted swimming pools into ponds. The result is normally a problem pond because such ponds are too deep to keep clean they do not have bottom drains. My advice would be fill in the pool and start from scratch with your pond.
A bottom drain is a desirable feature of a pond but should be considered a nice to have and far from essential in smaller ponds. It is unnecessary in ponds less than about 5,000 litres or 1,200 gallons.
This web page is an extract from Tony Roocroft's "The Complete Pond Solver" ... you can read more about it at http://www.really-useful-books.com
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