Address: Casper Publications Pty Ltd PO Box 225 Narrabeen, NSW 2101 Manuscript submissions: The Editor Ph: (02) 9905-9933 Fax: (02) 9905-9030 E-mail: casper@hydroponics.com.au Design Concepts: Studio Canvas Ph: 0401 589 620 E-mail: imogen@studiocanvas.com.au