I was just wondering where you found the info, I knew the answer to the question which you answered without the question actually being asked, the composition of sea water today is most likely different than it was in the Devonian or Carboniferous.
There is no better love between 2 people than mutual respect for each other WT Young, 2002
Who gave anyone the authority to call me an authority on anything. WT Young, 1969
Since Evolution is only ~90% correct it should be thrown out and replaced by Creation which has even a lower % of correctness. W T Young, 2008