I poseted a message yesterday and am stuffed if I can find it. so here
it is again

Has anyone ever made a corrugated metal rain water tank

I live in an area with no mains water connected, so rely on rainwater
collected from my roof into two 22,500 ltr tanks 13,000 of which is
reserved for bushfire fighting.

With a growing family and drought I need another tank.

The price of one of these tanks is approx $2500 AU.

These tanks are old technology and simply curved corrugated metal
riveted together.

I know that you can order the steel from suppliers curved to any
radius you like.

Has anyone ever made thier own tank?