Thanks, Paul and Jim.
The wood frame is from a company in Canada called Kim's Ponds.
https://kimsponds.com/
This is my 2nd pond from them. I decided to get it unfinished this time, and used a top shelf tung oil stain. I am extremely pleased with the results.
We did put in 5 comets I bought from the nursery for 5/$15, and yesterday I put one of the small ones from the patio pond in there for a total of 6.
Between the greenhouse pond and the food forest pond, I now have 16 comets. The patio pond is now empty of fish. I want to drain it, sand down the frame, and put the same stain on it I used for the greenhouse pond.