I'll add this too: if there is any way not to grow plants, someone has grown them that way successfully anyway. The only real problem with a UG is the one you have with or without plants and that is the substrate becoming dense with detritus and turning hard and foul. This needn't happen at all but I think it's harder for it not to happen than to happen. sh __________________________________ Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo. http://search.yahoo.com ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe aga-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/aga-member/