Depending on what you want out of the pond, you can enlarge the pond which could give you a much larger fish population. However if your content with size I wouldn't start over since your just wasting money. The size of the pond doesn't seem that large and you can probably easily manage it very well. I would add a handful of 9-12 inch channel catfish which should be rather cheap. I would still remove a few bass to let the BG to spawn.
