In the process of inventorying the consumables during the first night, someone discovered that, as things stood, the astronauts would asphyxiate from carbon dioxide buildup before they got home. In both the LEM and the command module, carbon dioxide was removed by circulating the air through canisters of lithium hydroxide. The problem was that Aquarius had only two such canisters, not nearly enough to last the journey home. Odyssey had plenty of canisters, but they were the wrong size and shape to fit the LEM’s equipment.
