Quick update....
poured the first bottle of woodland scenics water last weekend, made some rocks from woodland scenics molds. The water did not cover the entire pond and took longer to dry than 24 hours, the lightweight hydrocal did not set properly and the rocks just fell apart when taken out of the molds.
Have ordered other stuff yesterday to make the rocks, got another bottle of water to pour and we added rock talus around the edge of the pond today. We also hot glued the risers down, added shaper sheet to the back of the pond and added plaster cloth for the rocks. Built up the corner mountains with wadded newspaper and covered it with plaster cloth, also covered the risers with plaster cloth today.