They did use styrofoam beads in alot of the mixes and still do. If it is styrofoam it will be more of a bb of about the same size. Perlite will crush but styrofoam won't. They both blow away in the wind! Years ago I used to but the styrofaom beads and mix it with my seedstarting mix and it did work good to airate the soil. I don't use it any more.
Last edited by Bobberman
on Tue Dec 06, 2011 9:25 am, edited 1 time in total.
I enjoy fishing ,gardening and a solar greenhouse! carpet installation repair and sales for over 45 years! I am the inventor of the Bobber With A Brain - Fishing Bobber!