Makings of a Pond

This is a back blip and I have since encountered a wee snag when I dug to not quite the depth I needed to fit my tub-cum-pond and found I'd come across a hard foundation of some sort.
Anyway, not to be defeated, I sawed off a good 2 inches from the top of the tub so it might sit nicely inside the hole.
Still a work in progress.