I have read and heard of a lot of people using fishing line to attach corals. Maybe a lot of people know this also but some may not. If you go to the craft dept. or a craft or sewing center, you can get nylon thread. It is a lot easier to work with, water proof, and very cheap. On the down side, it snaps when pulled too tight, or rubs the rock too hard. Oh well just thought I'd pass along the info.
Chris
Chris
