11. It is often grown in a peat : sand or perlite soil. 12. No matter where it is mined, all perlite is the same chemically. 13. Perlite is a volcanic rock " popped " at high temperature.14. I add compost and round out the mix with peat moss and perlite . 15. The popularity of perlite usage as a filter medium is growing considerably worldwide. 16. Some vermiculite exfoliators blend with lower cost perlite also. 17. It is sometimes mixed with lightweight aggregates, such as perlite or vermiculite. 18. There was also limited perlite and plastic products that moved along the line. 19. Perlite is due to hydration of glass causing expansion and not necessarily devitrification.20. He founded a perlite business which he sold to a major agricultural supplier.
