I just setup a new QT pond, very simple and was quite cost effective!
made from 700 Perspex\canvas
2m x 1m x 1m so 2000litres
Has pockets that I have 50mm pvc piping in, then hole sawed 22mm holes into the tops of the pvc pipe where I then have 22mm aluminium piping holding the tank up.
Then also just added a 3 tier bakkie shower which lava rock, bio balls and loolitubes in.
Has a 5000lph submersible pump with a dual outlet airpump in as well.
Cheap and easy setup and works well and is easy to put away\setup when need be.
Canvas Tank was around R600
Frame was around R500
Piping and bends R150