Existing pond - Add waterfall/bog/filtration
I have an existing pond in my back yard that I would love to turn into a Koi/goldfish pond. A horrible diagram drawn by myself can be seen here: http://www.l3i.biz/images/backyard_diag.jpg
I would ideally like to add a waterfall on the concave part of the pond. I would also like to either incorporate a biofilter and/or a bog/small stream area around the convex section heading toward the concave area. I estimate the pond to be around 2633 gallons(I believe they tried to make a spa out of it). Also any thoughts on where I should try and fill the bottom a little. Seems to be about 4-5 feet deep. Any suggestions on materials would be great. Cost is an issue and I would like to try and do this affordable yet look nice. I may try a Skippy type filter. What is the best way to keep is winterized? Thanks for all of your knowledgable advise to a pond "noob"