Comment 3 for bug 1810682

As kaputtnik said it isn't possible to set water or fish to zero as they will be set to default in this case.
By the way: in the current implementation of the wells the resource water doesn't make much sense. Because the working area is to small an the well will deliver 66% even when put on no water. Most players won't notice an empty well at all. (this was something I had to deal with in empire 4 mission)