Talk:Standard O₂ Tank/@comment-2601:193:4100:6920:92B6:86FF:FE4D:8480-20170915130413/@comment-27906654-20180206191647

I tested this out and they technically did not remove it. Only the equipped tank will be active, but if you have a spare tank in your inventory you can swap it out while in an O2 environment and fill it and then put it back in your inventory. You can still stack tanks, but now the game keeps tabs on how much O2 is in each tank. So you can carry multiple tanks filled with O2, you just need to swap them in/out of the equipped slot.