Looks like that pump is not submersible. I'm locating the pump at the
bottom of the skimmer box, so I'm not sure that one would work either.

You did point out the pump I currently have. I'm sure not getting
another one of those. No response from the manufacturer. Failure after
only 22 months of use.

Looks like I may have to rework my current connections. With the pump
you suggested, how do you prime it? Where do you locate an external
pump in a pond setup?