breathing underwater (Ori and the Blind Forest)

-Lord-Ema-
Lol! I pumped in, but I didn't clean the water, if I cleaned it, then I wouldn't have to pump it in.

In the story, you must cleanse the water source, then you will not receive damage, but you can stay under water for a short time. The perk that you pumped in gives the ability to breathe under water, i.e. swim as long as you like, but the water must first be cleaned