Well, I'm a Ponder too!! My pond is relatively new, but we alredy have tons of babies. Some are butterfly Koi and a few are shubunkins and the others, it is hard to tell, one of em' has an orange head and tail, w/a black streak going down it's back. At the top of the pic is my bog, and I have tadpoles up there and lots of frogs. It is strange, no matter how long you have your pond you are always still excited and having to buy New things for it. I still need more rocks, but we'ss finish one day I hope. I used an old blue pool liner, becuz I had heard talk of it and I had to start out as cheap as possible to talk hubby into it, and it worked. Now he's so proud of it too, and he's the one that shows it off first!!! He worked hard digging that thing out with a jack hammer, to get thru this Red Ga Clay! Well, talk to you guys later!
I think you're right; no matter how long you've had a pond, they're always fun to "play with". Our two ponds were here when we bought the house two years ago. Since then, we took out the waterfall/stream the previous owners built, then we emptied the pond and dug out a shelf all the way around (we have soil VERY similar to yours...)
This year, we added a bog filter with a smaller waterfall, then a bog garden next to that. Something tells me next year I'll have another inspired idea and will want to change or add something else ;0)