Thanks for all ther replies and info!
Maybe I don't need fish. Ironically, my raised pond will be suplied by
a big ceramic fish spout on the adjacent retaining wall. I'll start
out without fish but will add some evnetually.

As to the skippy filter, it would need to be hidden to keep the upscale
aesthetics of the courtyard it will be in. I may be able to conceal it
behind the stone retaining wall and have it supply the fish spout. Or
maybe hidden behind a waterfall up the hillside (which I want to add
eventually).
Sam