You need one of these,
Foldable aquaculture pond. Not sure were you would by one in your country, their hard to find in Australia these days. Come in both rectangular and round, often used for koi showing in some countries.
I have also used them when fish got too large for my tanks, and for over wintering koi in a basement when in Wisconsin.
above 400 gal Index for over wintering, below 1000 gal with Tilapia
You need one of these, View attachment 1498829
Foldable aquaculture pond. Not sure were you would by one in your country, their hard to find in Australia these days. Come in both rectangular and round, often used for koi showing in some countries.
I have also used them when fish got too large for my tanks, and for over wintering koi in a basement when in Wisconsin. View attachment 1498831
above 400 gal Index for over wintering, below 1000 gal with Tilapia View attachment 1498832
I have seen those here but does the plastic slowly leech into the water or not? I know that can happen sometimes if you keep it long term. Also how would you put filtration on that? Like a filter size/type?