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us: Useful Formulas
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Pond liner sizing: Measure the hole that you have excavated. Add twice the depth plus 2 feet for coping to get the magic number, then add that number to the length or width of the hole to get the liner size needed.
Do not exceed 10” of fish per 100 gallons of filtration.
• Calculate your “effective” pond volume:
- Average depth less than 2’ 6” add 25%.
- Pond located in full sun add 25%.
• Size your pump to circulate your entire pond in 2 hours
(filtration pump)
• Know your pond’s volume in gallons.
Length X width X depth X 7.5. then add for “effective pond volume” above when sizing your filtration but not when adding chemicals.
• Size your waterfall pump: a minimum of 100 gallons per hour per 1” of weir width.
Prices subject to change without notice.