Ok those are all great replies! I wonder how hard is it to get out of a tank if you wanted to redo a section.
Ok that sounds great! Let me know how it goes! I would assume it would soften up with water and can be rearranged and stuff. i was wanting to make part of a 50 gal tank with the clay but leos are in the tank and it would be a pain to set up another temporary tank until the clay dried. Such decisions!
We used Excavator to cover foam blocks that we sculpted into a hill and valley like formation. So far no problems with it.
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AWESOME setup!