These people have a live person who will discuss the pro and con of different media. http://www.kramerindustriesonline.com/blasting-media.htm I have a cabinet like this. http://www.guyson.com/blast/manualblast/formulaseries/formula500.php I like the fact that I can dump the media for different applications. I also have a 100lb pot and a 600lb pot that are so old that the brand is gone. I haven't used the 600Lb pot in years.