Here is the finished Skippy. I am going to wait to see if there are any leaks or other problems before I pondscape it. It's not pretty, but it appears to be working well.

Here's the process we followed:

Drilling holes for outflow to stream and bottom drain:

Making silicone gaskets for above holes:

Gluing elbow to bottom drain:

Leveling tub:

Outflow and bottom drain extensions glued on:

Bottom grate cut to fit with inflow from pump assembled:

Shut-off valve added to bottom drain extension. Filling to test for leaks. I am using a clorine filter:

OOPS! Silicone gaskets didn't totally work, so we are switching to Marine Epoxy, which did work:

Flat A/C filters lying on bottom grate:

Bags of scrubbies. They didn't fill the area so I got one more A/C filter and cut it up into pieces to wedge around the bags:

And that takes us back to the first picture which is the finished Skippy. As you can see from the green water, which I have had for 2 years, I really need the skippy. I am going to take pictures to record the improvement in clarity.

Anne