Thank you, John. I glued some small rocks in the gaps where the water was sneaking through and seemed to have solved the problem. I am so excited....I found a new organic store which sells hydroton balls and fish fertilizer and other stuff for vivariums. Then I found a nursery that is willing to try and order some mosses and ferns and smaller bromeliads. They had a fern called a Crocodylius (or something like that) which had great texture on the leaf but the sales clerk said it was prone to dark spots from moisture. She wasn't sure. Does anyone know anything about these?