Understanding the numbers
The terms 7/14 and 14/25 refer to the size range of sand particles, defined by the mesh size of sieves used to sort the media.
- 7/14: Particles pass through a 7-mesh sieve and are retained on a 14-mesh sieve.
- 14/25: Particles pass through a 14-mesh sieve and are retained on a 25-mesh sieve.
In simple terms, 7/14 is coarser than 14/25.