Is the window glued onto the tub? Because the first thing i'd want to with this nest is put a ground layer of sand-clay substrate into the chamber.
And i know it increases cost, but some holes for screws at the sides of the lid might be a good idea (so you can put screws through and fix them with a nut on the other side).
Many ants have this particular habbit of pushing small pebbles of sand or trash in between the tub and the glass - with this setup i can very easily see them lifting the lid enough for workers to squeeze through.
The hydration seems decent, although to be honest i'd want a secondary port, so i can attach a test tube. Not a fan of tubeless hydration systems, especially for small founding nests, where when for whatever reason you can't water them for a week (might have an accident or get sick enough to need to go to hospital) your nest will dry out and the ants will die. Water tubes usually last for several months, so they're always great as a backup system in case something goes wrong.
Edited by Serafine, November 8 2023 - 12:47 AM.