Therm-O-Rock Perlite in Poly Bag， 2 Cubic Feet<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Perlite in poly bag</li><li>Perlite supports root growth and retains moisture， air and nutrients which it releases as plants grow</li><li>Provides superb aeration and moisture retention when mixed in with other soil materials</li><li>Suitable for hydroponic greenhouses</li><li>Available in 2-cubic feet poly bag</li></ul></div><img src="http://ecx.images-amazon.com/images/I/416ijR1AisL.jpg" noproxy>