Very pretty fish! Goldfish are notorious for spawning all the time; this can become a problem as it will result in overstocking. If I ever get a goldfish pond I'm only adding males. Your pond is about 130 gallons (if you were wondering), and probably shouldn't have anymore fish added to it. Since you said that you have that lip on the edge, you should think about getting some bog plants like cattails, rushes, or iris. They will certainly help keep the water clean for your goldfish in the absence of the filter (and when the filter comes back, too). Floating plants like water lettuce or water hyacinth will also do a lot to clean the water and keep it cool (and free of algae). If the pond gets enough sun something like water lilies would be beautiful.
I love seeing other people's water gardens. Can we get a full pond shot?