The formula for sizing a pond liner is:

POND LENGTH + (2 TIMES DEPTH) + 2' = LINER LENGTH
POND WIDTH + (2 TIMES DEPTH) + 2'= LINER WIDTH
Example:
A 12' long, 7' wide and 3' deep pond is...
12' + (2 * 3) +2' = 20' Long
7' + (2 * 3) + 2' = 15' Wide

How many gallons is my pond?

The formula for determining the number of gallons is:
FOR SQUARE AND RECTANGULAR PONDS
Length * Width * Depth * 7.5 = Gallons

FOR ROUND PONDS
RADIUS * RADIUS * 3.14 * 7.485 = Gallons
Example:
12 * 12 * 3.14 * 7.485 = 3,384 Gallons

What is "Geotextile Underlayment"?

The biggest contributors to pond liners failing are poor, unstable soil conditions and rips and tears from rocks and boulders. Shifting soil creates pockets and voids under your pond liner, forcing it to stretch under the weight of the water. Rocks and boulders placed on and around your water feature create aesthetically pleasing visual focal points. They can also penetrate, tear and harm your liner. Underlayment adds an extra layer of protection between pond liner and rocky or unstable soils. It stabilizes soil to prevent air voids from forming between the liner and earth; reduces wear and abrasion from rocks and roots and extends the life of pond liner.

Step by Step Support

Here at Half Off Ponds, we strive to make to work hard, so that it is easy for our customers to shop our store. We also provide tutorials and instructions for when you may need assistance. Repairing pond liner and running pipe through liner can be a little complicated, if you have never done it before. Check out our tutorial page for more information.