Water Gardening: Pond House, 4 by Tropicman

Tropicman wrote:
I built a 18x18x10 metal building with 2 t0 3 inches of closed cell spray foam on walls and ceiling,with 7 4x6 ft picture windows and a 2ft skylight across the top peak of roof,the pond is 12x9x2 I have 11 gold fish which are about 10 inches long.I'm zone 7 hoping this pond house will move to zone 8 or higher. I planted palms and bananas and other fruit trees hardy to zone 8. Would like to get some opinions on how you think this work out,as far as over wintering fish and plants.