VEVOR Canvas Fish Pond, 1781.3L Above Ground Fish Pond, PVC Koi Tank with Clear Viewing Panel, Rectangular Goldfish Tank with Stainless Steel Frame & Drain Valve, for Breeding Koi, Irrigation(Black)

Do you mean to fill the container with water and then bury it 20 centimetres underground, Is that correct? It's possible to bury it with soil after filling it with water, but this will reduce the lifespan of the stainless steel support frame.