Big and Chunky Perlite is an extra large perlite that maximizes oxygenation and nutrient uptake. Use as a stand alone growing medium or as a mix in medium. Very large chunks, averages 1" pieces. The exceptional physical properties of this giant perlite make it tops in the perlite world for adding porosity to soil and soilless mixes. This giant perlite has numerous hydroponic applications as well. Can easily be broken down into smaller pieces if needed.