Here's a pic I took from my roof. It gives you an idea of its dimensions. There are 3 ponds that flow into each other. There's a small Pre-formed pond on top, that flows into the pond on the left. The preformed pond on the left flows into large pond that was the last pond I made. It is 28 inches deep by about 10 feet in diameter. It has a rubber liner. The two little cedar houses contain the bio-filters that run 24 hours 365 days a year. The pond contain the fish that you see in my underwater pics. You can see my largest koi (20 inch) in the large pond at the surface to the left. The plants on the deck are Plumeria's and the Sago palm is on the right Bio-filter. They are brought in during the winter. The rocks are Sponge-rock, sharp but I like their look.

Image link: