I have a foldable PVC fish tank that I was going to use as a holding tank when I moved. Didn't end up using it so now it's up for sale. Holds around 350 gallons. It's 150cm x 150cm x 60cm. Blue in color. Pic posted of what it will look like.
Great for indoor koi setup for winter when it is too cold outside.
Please msg me on here and I will get back to you.