> bubbled (as another mentioned, yeah, probably chlorine gas) Suddenly I am reminded of my A-level Physics project, where I tested the relationship between sal

> bubbled (as another mentioned, yeah, probably chlorine gas) Suddenly I am reminded of my A-level Physics project, where I tested the relationship between salinity and conductivity with some graphite rods in a beaker of water - has to move to a chemistry lab and use their fume hoods after the first day of testing :D