Yeah, I'm not sure what to do about the bottom and the poop. I'm going to throw some sand in the bottom to fill in the cracks in the rocks and make life easier.
Can you put a powerhead in a pond? Perhaps I could do something like that and keep the water moving on the bottom to stir up the junk.
They've actually already put water in it, however, I may drain it as this water is awfully murky and rather than wait for it to clear, I could just restart with cleaner water.
They tossed some baby goldfish in it as well to help cycle it...I thought it was nice of them as they're concerned for my fish, but 5 small goldfish aren't going to cycle the pond nearly enough for a 2' catfish. I actually have all of the bioballs hanging out in my sump for my 450g. So I'll be moving those into the filter and I think we'll be good.
I think they will be finishing up today, if not this weekend. Before any fish go into it, I'll be fixing some few minor details...like the bottom rocks, for example, as well as loading the filter with media, making the skimmer better, etc.
More pictures coming soon!