[Who doesn't enjoy swimming with a burning in their eyes and losing a layer or two of skin?]

There are water treatments for that, but they're only effective if removing additional toxins from a contaminated environment. [Hello fringes life.] If that's the environment's equilibrium it'll change the entire system.

[Too bad. It's beginning to look more like humans living here would take a while to truly terraform into hospitable - in which case, might as well have stayed on Tellus.]

Any microorganisms?