They actually came with the house when we bought it. I know they can be found at feed supply stores. They are used as water troughs for cattle. Some garden centers and specialty stores such as Porch here in Santa Barbara sell them as well. Hope that helps. They are fantastic!

And I love the pepples that they sit on.

any ideas where to get pebbles like that? Is there a specific name for them?

I believe the gravel is called California gold

You can find them on Amazon.com or check out www.behlencountry.com for other stock tanks.