bubble box to root clones ?

i just made my own bubble box to root my clones in.my question is can i use just perlite in my 3 inch neted pots to start my clones ?

In my personal experience, despite the porousness of perlite and its sterility, hydroton (lava rocks) and anything like hyrdroton is better for your formation of roots because its shape allows for great airflow, and ample room for roots to move. When you think of circles stacked on circles like hydroton, the result is an opening where roots can grow through, since circles are only touching each other in one spot (like a tangent line as seen in the link).

http://library.thinkquest.org/C006354/9_1.ht16.gif

The perlite link below, illustrates how when bunched together, it forms a more solid mass that your roots have to push through and reduces aeration to the root zone.
http://www.exotischezaden.nl/exotische_zaden/images/Perlite.jpg

I have seen people not use anything if the nets are the ones used in a daisey cloner

i dont use nets for my cloner just neoprene sleeves i put the clones and the stems hang down to get the bubbles