On Sat, 8 Apr 2006 19:55:04 +0100, "Davy" wrote:

I have recently moved into a house and have found a butyl-lined pond at the
bottom of the garden with very little water in it. I have filled it but
find that the water level is falling. Not being experienced with ponds I
cannot tell if this is normal evaporation or a leak.

What rate of surface level fall would you expect to be normal for a pond
that is:
- in Wiltshire in England
- in shade
- about 4 square meters surface area
- no plants
Davy

Not much currently, assuming you're coolish, occasional rain right now? Is
there a waterfall? Moving water of any kind?

If no moving water. Take a bucket and set it on something in the pond, fill
it to the level the pond is at. If the water in the pond, goes below the
level of the bucket, you've got a leak. ~ jan

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(Do you know where your water quality is?)