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CALCULATIONS
Approximate Gallons of Water in a Pond- Irregular Pond: average length x average width x average depth x 7.48 = total gallons in pond. Circular Pond: ∏ r 2 x average depth x 7.48 = total gallons in pond.
Approximate Gallons of Water in a Stream- Length x Width x .25 x 7.48 = Gallons in a stream.
Calculate Liner Size- 2 x pond depth + Maximum pond length + 1 foot extra = Liner Length. 2 x pond depth + maximum pond width + 1 foot extra = Liner Width.
Example: For an 11' x 16' pond that is 2-feet deep, you will need a 16' x 21' liner. (2x2'+11'+1'=16')x(2x2'+16'+1'=21')= 16' x 21' liner.
- Rock And Gravel Calculations-
Quantity of boulders used in a pond (tons)= length x width ÷ 65
Quantity of 1/4 to 3 inch gravel used in a pond (tons)= tons of boulders used in pond x .45
Quantity of boulders used in a stream ( tons)= 3/4 ton per 10 feet of stream length.
Quantity of 1/4 to 3 inch gravel used in a stream (tons)= 1/2 ton per 10 feet of stream length.
Approximately 3/4 to 1 1/4 tons of boulders to build around the face of a standard Biofalls® filter.
Note: Quantities of stone may differ depending on type of stone used.
An example 11' x 16' pond with waterfall and no stream.
Boulders:
11' x 16' = 176 sq. ft. ÷ 65 = 2.7 tons of boulders ( rounded to 3 just to be safe) = 1 ton for the face of the Biofalls® filter = 4 tons. Try to use a mixture of 6 to 12" and 12 to 18" boulders for a more natural look. Using several large. Using several large ( 18 to 36" ) boulders at the edge of the pond makes a great perch for feeding the fish and pond interaction.
Gravel:
3 tons of boulders in the example pond x .45 = 1.35 tons of 1/4 to 3" decorative gravel. Add a thin layer of gravel, only use enough to cover the exposed liner.
HARDINESS ZONE MAP
Range of average annual minimum temperatures for each zone.