The buffet has lots of copepods, amphipods, and mysids in there. It's seething with all of the above.
I moved about 6 or 7 from the main tank into the buffet, and I'll probably move more. I moved about 5 into the sump. I tried to move a few into the little breeder boxes, but they can squeeze through the cracks whenever they want. (Interestingly, the cracks are too narrow for the mysids to get out!) So that leaves easily over 100 in the main tank.
I'm also interested to see who survives, and where, but there will be no way in hell I get any kind of reliable statistics. Mainly because I don't know where they are in the rockwork (even in the buffet), and I won't be able to see them to count them. It will be, at best, a matter of identifying any individual survivors in each location -- but I really don't expect to make any kind of reliable comparison.