I setup a intex pool from Amazon.
It has a drain built in and I run two box filters and a large air stone. I use it to raise certain species that I can only get as very small fish. Once they are a decent size I put them in the pond. It seems to help predation and you can really get them growing when they have no competition. I have a group of Carpintis I’m growing that I hope will make great pond fish for catching and eating.

Here’s a pic of some of the exotics I’m putting in the pond this April.

[Linked Image from i.ibb.co]

[Linked Image from i.ibb.co]