I put a koi pond in my back yard that is a rectangle shape, 10 feet by 8 feet and 2 feet deep.
I did 3 rows high of concrete block, I actually glued them together with the liquid nails that is
for attaching capping stones on walls. I then drove rebar down into them and just infilled every
other hole with cement. Very, very easy to do, and cheap. I then got 12" pavers for the top and
glued them down. The liner I got from our local home depot and it was about $100.
Then pump was about $60. Total, I probably topped out less than $3oo dollars. To decorate the
outside, I stained the concrete black and I am currently in the process of glueing the black
mexican river rock to the side. Looks awesome !!!
Granted... not a stream with a waterfall, but very cool none the less. When entertaining folks, the
paver top acts like a bench and you can just sit and watch the fish.