phil59 wrote:In fact, reading you, I say to myself, that 50 m3 at one time, would not be a good idea.
It would be better to have several tanks.
With lags of one month for example of filling, because if pollution, it is better not to put its eggs in the same baskets.
I say that for a future project ....
It would also have been my idea IF the terrain permits.
Acquire IBCs over time and opportunities: secondhand, BC ... etc
FYI I bought mine almost new at 50 €
This allows you not to put pressure on yourself while regularly increasing its storage capacity over time and therefore smoothing the cost over time.
And (again IF the terrain allows) in general nature covers all of this pretty quickly.