Peter Breed wrote:
I have a relatively small pond of 2000L or 550 UsG, and one the
problems I have is fairly large swings in temperature. I was
considering using the heat of the ground to moderate long and short
term temperature fluctuations by burying a pipe 3 feet or so
underground round my garden, and pumping the pond water through.
The idea came from methods for heating and cooling houses by a similar
method. I've tried a few web searches but not found anything relevant
yet. Has anyone come across such a scheme?

Peter

Do you have a decent size compost heap? If so, run copper pipe underground
from pond to the heap. Bury the spiral pipe from a hot water tank in the
heap, and circulate the water through it. Just a thought
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