JustJack, it sounds like you have your work cut out for you, but ohhhh the fun when you get it all fixed and can enjoy YOUR accomplishment! Sounds like it will be 100% your project once you are finished.
My goals for 2012 are to get the 14 koi I purchased ... last month ... into my pond, but to first build a second smaller pond (my original is about 4,000 gallons) so that I can move all the goldfish into the smaller pond (it will be at least 3.5-4' deep as well). But, how to build the new pond and where to put it so that the 2 ponds will interconnect and so forth is going to be the test. I'm thinking of having the second pond somewhat lower than the first one which is about 8" above ground level. I think if the newer pond is 5" above ground level, I will still keep out the ground water, but I can possible have water running from the original pond into the new pond, and thus circulating all the water for everyone. I would have to have a pump in the bottom of the second pond, and possibly run it into the same DIY Skippy filter. but haven't figured out how to do that and keep everything beautiful to the eye. Thinking of a bridge between the 2 ponds, and maybe a stream of some sort running from one to the other. Of course, that would mean keeping the water level within a couple inches of the same height at all times. But. I really like the idea of a small stream. Drawback ... I can stand on my deck and see the full length of my koi pond as it is now. If I add another pond, I won't be able to see the fish as well from the deck. So, plans will be drawn and re-drawn all winter, I suspect!
I, too, have 2 indoor aquariums (I watch them all evening. as they are in my living room) that I enjoy year round, and now with the basement "pool" housing the new koi, I have them to feed and watch as well. It seems I have definitely done something right in this last year, reading and learning so much on this forum. as I have lost very few fish in my aquariums. whereas earlier last year, it was common for me to lose one or two out of every 4 fish I bought for the aquarium. So, thanks once again for all the knowledge I have absorbed this past year. May the coming year be just as much fun!
Patti