Do you have a pump/filter in your small pond? If so, just wait it out, the water has to cycle in all new ponds.
I have some water gardens that have no pump/filters. Sometimes they are clear, but usually not no matter how much chemical I would use. My goldies don't seem to mind the tinted water just as long as they have enough air. I do vacuum the bottoms regularly, do water changes and use air pumps.