I wanted a bigger tank voor our G.riobambae. Thought I'd post some pictures. Made the imitation rocks out of tempex (don't know if it's also the English word, but it's a foam) covered with grout and sand. The plate is also tempex. Foamed it all onto the tempex plate. Covered the foam with Elastopur and pressed some fern root in it. When everything's dry I can shake off the excessive fern root.