Let dupes pick up all the meal lice

[x4550]

if you deconstruct a ration box in any other atmosphere than o2/po2, dupes can never sweep the contents (only tested with meal lice) because they have to go catch their breath before they can pick it all up, and they drop whatever they're holding.  I assume they're doing this because they're counting the different freshness levels as different items.

[The Plum Gate]

You can store more in two side by side fridges, unpowered, in sterile atmosphere.

2x2 for 150, or 2 1x2 for 200.

Chlorine counts as well. It looks like you have your setup a bit far in unbreathable space.