Quote:
Originally Posted by F
On 16/02/2012 06:16 Doug wrote:
On Feb 15, 2:07 pm, Fnews@nowhere wrote:
On 06/02/2012 12:31 F wrote:
Following comments here and elsewhere about the value of a waterfall in
cold conditions, we're thinking of installing one (only short, ~1M
long). Has anyone any suggestions on a suitable pump and pre-formed
waterfall? The pond is 2M x 1.5M x 0.75M deep.
Suggestions on any associated equipment that would eliminate/reduce the
green pea soup we currently experience in summer would also be welcome,
along with suggestions for suppliers. The Seapets experience was less
than inspiring with telephone requests for advice being met with great
vagueness and emails being ignored.
Assuming you mean a carpet of duckweed, this can be minimised by
flowing water, preferably a fountain which will keep an area clear of
it. Frequent scooping out with a kitchen strainer also helps a lot.
No, no duckweed. The water simply turns green and it's difficult to see
even a few centimetres into it.
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F
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I've a 3000 gallon koi pool that's 5' deep. I run in summer, an Oase 8500 submersible from a pump sump that feeds the filter and supplies the waterfall on a valved by-pass.
In the winter I run an Oase 5000 just for the filter.
I don't run the waterfall in the winter as this would lose a lot of the heat in the pool by the latent heat exchange.
The water is kept from going green by employing a 35watt UV sterilser 24/7 in the summer.
The rate of flow from any pump depends a lot on how far and how high it has to lift the water, the diameter of the pipe and how many bends in it.
What pump depends on what rate of flow you want to come down your waterfall, from just tinkling sounds, to a torrent.
Garden centres usually have some running, but they will configured to show as near their maximum output because they'll have the pumps close to the outlet and they won't be lifting the water very high.
Garden centres also sell a lot of different pre-formed waterfalls. Some look quite good, but they didn't 25 years ago when I built my pool.
A lot depends on what sort of surround you have to your pool.
A non-matching one can look really naff.
You could build your own. I did that using the same York stone that surrounds our pool. It's set in concrete, we like to think we've got it looking as natural as possible. The waterfall is supplied by a pipe from the sump under the surround and up to the back of the waterfall, you can't see it at all.
If you can illuminate it, the combination of the sound of the running water and the changing reflections of the light can make it look very attractive on summer evenings.
I hope this helps.
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