Rock Calculations

* Formula to calculate the approximate quantity of rocks to use in a 2 ft. deep pond.
                  
*  Quantity of boulders used in the pond (tons) = length x width ÷ 65

* Quantity of 1/4 –3 inch gravel used in the pond (tons): Tons of boulders x 0.45

* Quantity of boulders in a stream (tons): 3/4 ton per 10 ft. stream length.

* Quantity of 1/4 to 3 inch gravel used in a stream (tons): 1/2 tons per 10 ft. stream length.

* Approximately 3/4 – 1 1/4 tons of boulders to build around the face of your Standard BIOFALL®.

Note: Quantities of stone may differ depending on the type of stone used.

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