They said, it contain mercury. This is really bad, I think, will use some chemicals to bind it chemically into insoluble stuff and then just filter out. Also i

They said, it contain mercury. This is really bad, I think, will use some chemicals to bind it chemically into insoluble stuff and then just filter out. Also it contain calcium, magnesium, these are typical for Earth, so will just use some water softeners. With some luck, possible, to find on surface some minerals could be used to bind mercury and to soften water.