Hi all! My name is Char and I have been a wannabe pond addict for many years. My fixes started with an abandoned turtle sand box that my kids had outgrown. It was lined with black plastic, had water run to an old hand pump and was surrounded by chunks of broken concrete. This sat on a concrete slab that covered a dug well behind our house. A couple of years later, I upgraded to a 4ft. kiddie pool covered the same and with the same pump. I was able to keep this clear with a prefilter on the pump, a few bunches of elodea, and a potted marginal. I kept a couple feeder goldfish to control the mosquito larvae. This was nice, but I continued to dream of a waterfall and waterlilies! This spring I took the plunge and after a lot of research and lurking on forums such as this, I designed a "bigger and better" pond. It has an upper pond (over the dug well slab) with a small waterfall (about 2 1/2 ft. tall). The upper pond will empty into the lower pond which is 6ft. diameter and 3ft. deep. My question now is where to put the bog. I have brick walls laid in the sides of the upper pool for this or I could dig one next to the side of the lower pool. (there should be enough of the corner of the liner there to cover the hole) The advantage of the upper pool would be the water flow from the waterfall. The advantage of the side bog would be better insulation in winter for the plants. (I live in zone 5, Northwest Ohio, USA) I will have a 26 gal skippy type bio filter with a bottom drain and an 1800 gal/hr submersible pump. The hole is dug and the liner is in place with a little water in it from a heavy rainfall the other day. I'm waiting for delivery of a water transfer pump to bring water up from the dug well to finish filling it. I plan on sticking with goldfish. Any ideas, opinions or suggestions would be appreciated! Thanks.