On Tue, 13 Jun 2006 11:21:17 -0300, Derek Broughton
wrote:

PlainBill wrote:

Wow!! A lot of misinformation here!!!

A given pump will be just as efficient if it is pulling water up from
a pond or pushing the water.

No, I'm just not buying that. Look at the edge case - if I have a
sufficiently powerful pump in the pond, I can push water up to any
conceivable height.

So define a sufficiently powerful pump please.

If I have a pump outside the pond, at the top of a
waterfall pulling the water, it is impossible to pump more than
approximately 32 feet - with _any_ pump.

Yo are so wrong on that assumption


So it seems pretty evident that
any pump placed _above_ the water surface is going to be less efficient
than one below the water level (though not necessarily _in_ the pond).
Just as I stated previously, your so wrong on that account.

A rule of thumb is the GPH rating of the pump should be twice the
capacity of the pond.
Whose rule of thumb is that.....

Odd rule of thumb. Another rule of thumb is 4 changeovers per hour, but it
all depends on the size of the pond.
Yet agaian whose rule of thumb....depends a lot on zone.

I'd want at least that rate for
anything under 500 gallons. I'd drop it to as little as half a turnover
for something in the 5000 gallon range.
A lot has to do with zone and sun exposure and a lot of other items
so much for that rule of YOUR thumb.It sucks if yo ask me,


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