It is amazing to see your pond. We have 2 turtles that we have for quite some time. One for 15 years and another for 2 years. We recently built an above ground pond enclosure and I will post picks of it soon, but we are considering rebuilding since it wasn't the best job. The weather here in Hawaii is getting to it because we didn't seal the wood enough. So, alas we are researching better methods and we have definitely fell in love with yours. The only thing we are considering is making it to where they can crawl out onto a land based platform (as we did with our recent pond). We are wanting to use your method, but split the pond in half (or 1/4) to actually make a piece of land for them to climb out on. We have had the same issue with them getting out onto a floating platform as our turtles are getting larger and heavier for anything we could find to hold them.
Thanks for the posting of your photos and ideas, they are a huge help for the visual concept. We are a military family and have to move quite often so it should prove to be easy enough to disassemble when we need to relocate. Oh, one question...do you think that with your type setup a submursable pump/filter is feasable to do the job? I ask that because we can't really get into the enclosure of a pump since move so often. We have one that literally just sits down in the pond (55 gallon) and it works fantastic. We are going to be doing away with the preformed and doing what you did but wanted to see what you thought about the type of pump/filter we have. (we also have 4 small feeder in the pond and they seem to live better than they did in our household aquarium).
Blessings,
Kim