[Strategia_In_Ultima]

Converters take two YEARS at the very least, two years in which you will get NO production from those moons - though that's not a reason for me not to use them - so in large-scale warfare with smaller Empires your moons will have no production for at least two years, which could be bad. On the other hand, you could just do it one moon at a time, which is slower but less economically crippling.

Or you could just mod in a few extra facilities for Organic Manipulation races (like Algae Basins or Chlorophyl Plants (as in manufacturing plants, not the United Floral Empire)) that convert atmosperes more quickly...