Disinfected Water (Subnautica)
To craft Disinfected Water you need to find Salt and a Coral. Cut the Coral with a Knife and pick up the Coral Chunks and take them to the Fabricator in your Escape Pod. There you can convert them into Calcium and along with the Salt you'll be able to craft the Disinfected Water.
Total Materials needed 1x Knife (Metal x1, Emery x1) 1x Salt 3x Coral Chunks, turned into 3x Calcium