Hey all, I have inherited an old, old, concrete pond with the old, old house I bought. It is about 8 ft long, 5 ft wide, 3 ft deep. Problem is, it has severe cracks in some spots, 1/2-1 inch wide, the bottom scaling away, and one wall with the top 20 inches crumbled away. I really want to restore the thing as I had a koi pond as a kid. Do I call a concrete guy, attempt to do it myself, call a pool guy?? I'm fairly handy but have never worked with concrete before. My thought is to pour a new concrete floor but the large cracks on the walls and in the corner has me concerned about being able to seal it, not to mention pouring new on the top 20 inches on the one wall.