A month later all 7 little Lysmata shrimp are doing fine. Three of them had a netbox to themselves, and two of them were paired up. I didn’t have any trouble with cannibalism, and the shrimp grow slowly but visibly. Food was plankton-based flake food, Wardley shrimp pellets, and frozen krill.
Meanwhile, the parents have gone through another cycle of laying and hatching. I’ve collected a few dozen zoeae which I’m raising in the same manner as before. If they make it to the post-larva I’m planning to try a more free-range approach to raising them and see how they do in larger numbers.