This is covered in Chapter 20 in the iAVs Handbook
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.4 to 1.2mm with zero fines, silt or clay.
- 40% of the sand particles to be between the size of a pinhead or a small ant (that’s between 1 and 2 mm).
- 40% should be a bit smaller, about the size of a grain of table salt (0.5 to 1 mm).
- 20% should be even smaller, about the size of fine sugar (0.25 to 0.5 mm).
It’s okay to have a few particles larger than 2 mm, avoid having particles smaller than 0.25 mm. The ideal sand should have a consistency similar to table salt or granulated sugar, with no powdery fraction or particles that could cause clogging.
Admin Changed status to publish 1 January 2025