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Formulas to Calculate Approximate Quantity of Rocks for Ponds

Formulas to calculate the approximate tons of rocks to use in a 2ft. deep pond.
  • Quantity (tons) of boulders: length X width divided by 65
  • Quantity (tons) of - 3 Gravel: Tons of boulders used X 0.45
  • Quantity (tons) of boulders used in a stream: ton per 10 ft. stream length
  • Quantity (tons) of - 3 gravel used in the stream: tons per 10 ft. stream length
  • Quantity (tons) of boulders used around the face of a Standard Biofall: - 1-1/4 tons
Note: Quantities of stone may differ depending on type of stone used filter

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