Quartz sand granulation 0.4-0.8mm, washed, in 25kg packaging, from the company ASTRAL.

This is the most widespread pool filter filling material.

The filter is filled with the quantity recommended by the manufacturer with a ratio (1-2mm)/fine (0.4-0.8) sand => 30% Coarse and 70% fine sand.

*First place the coarse sand and then the fine sand.