I am lucky enough to be planning an orangery next year approx. 10 x 4 metre, a lean to structure, brick wall of a couple of foot and then glass. This is purely for plants and not an extension to the house . As well as plants, I am thinking of putting a pond in it for growing water plants that like it a bit warmer and am wondering if anyone has any advice. I have a large outdoor pond so know all about maintenance. Any suggestions?