Diageo

Haha, sorry man, forgot all about it.

I should see the episode myself, it's possible you found a mistake, or perhaps you've understood it wrong. The way that ship works is, they constantly need to refill their resources, food, fuel, and water. They can't store water for several years I think. I think what they meant was they can keep going on for several years with recycling / refilling water with the storage they had. and just for several days with the storage they had after the explosion. But again, I'll have to rewatch the ep for all the details, I can't really anwser your question just from the top of the head .