Estimated value:

1 000 000
A living colony of microscopic organisms that can maintain optimal conditions for storing gas in a bladder. When placed in the bladder, the microbiota reduce the weathering process of the gas, which helps reduce losses when the bladder overflows.
Can be found on any expedition that includes Science Vessel (for humans), Queen (for xerjs), and Investigator (for tosses), with a probability proportional to the expedition's time in days.
Once per hour, active Microbiots may die with a 0.125% chance of dying.