If this is for a biological filter why not use a Philodendron? They do really well in this role; I have a picture of Rosario La Corte's fishroom here someplace and that's what he uses. -- /"\ / http://lists.aquaria.net \ / ASCII RIBBON CAMPAIGN / Killies, Crypts, Aponogetons X AGAINST HTML MAIL / http://killifish.vrx.net / \ AND POSTINGS / http://www.vrx.net