Ideal Water Level
3/4” Below
Front of Skimmer
Soil Level on
1st Shelf
Ex. 12
• The skimmer should be excavated down to a depth so
that the proposed water level in the pond is approximately
¾” below the top of the opening of the skimmer.
(See Ex.12)
• Re-check all your
measurements, including
length and width of
pond, plant shelf depth,
and overall pond depth.
STEP 6
INSTALL UNDERLAYMENT AND LINER
• Remove any sharp objects from the excavated basin that
may damage the liner.
• Unfold the underlayment fabric and place it into your
excavated pond basin. Starting from the bottom, remove
the slack from the underlayment, making sure it conforms
into all of the elevations.
• Now place the EPDM fish-safe liner on top of the
underlayment.
• The installation process is the same as the underlayment,
starting at the bottom and contouring the liner up and
out of the pond basin. (See Ex. 13 on next page)
• Try to get the large folds out, but the main goal is to make
sure that it’s lying flat and going into all corners. Don’t try
to get it perfect—you will hide the liner with rocks and
gravel later.
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