I get asked regularly about our awesome water feature at our Lincoln City house so here is everything you want to know about it. Jacob gets all the credit for buying the kit, digging the hole, and carrying the biggest heaviest flattest rock down from the clearcuts.
He purchased this kit from The Pond Guy:
We have the 20" kit which means the opening where the water comes out at the top is 20" wide. The 10" probably would have been fine. And there are probably a lot of options out there with a wide range of price options. He would not tell me at the time how much he spent :)