Jonna ~ I have enjoyed following your thread on the renovation. I am sure you will savor your haven for years to come.
You mentioned controlling the algae in the fish pond. There is a fish that we used in aquariums to control the algae and I wonder if you have access to it or have considered adding it to your pond. It is a Plecostomus
http://www.fishlore.com/Profil... They are interesting looking, almost prehistoric.
Thanks again for sharing your roof garden adventures.