wrote:
Butyl is definitley best If you get in the pond wearing waders, make
sure there are no pebbles in the tread of the soles and try to keep
the liner covered with water because it is the liner that is exposed
to sunlight which will deteriorate quickest.
Tony Bull www.caterpillarfountain.co.uk

Use an 18" strip of offcut liner around the edges, over the real liner. Any
degredation with affect the offcut then.
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ßôyþëtë