Google had promised us it was coming, and how its here: Chromecast has been updated with a new Backdrop feature that lets you display your own photos when you're not busy streaming something. You can also display popular photos from elsewhere, and news and weather snippets.
No, to soften water, you need a water softener. The salt used in the brine tank of a water softener does not directly soften the water, but is used to regenerate the resin beads in your water softener. These actually soften the water from your well by removing the hard water ions, calcium, magnesium and iron.
You have three choices when it comes to water softener salt. There is rock salt, evaporated salt or solar salt. Rock salt is mined from salt deposits under the ground and is used in its raw form, which contains traces of other materials besides salt, some of which are not dissolved in water.