Cris Capp got in a few buckets of salinity salt on the last salt order so i thought i would give it a try.I mixed it for two hours and tested it.I got 440 calcium...DKH was 12.5..this was higher then i thought it would be so i tested it again and got the same results.The magnesium was 1350.I tested these all with salifert test kits.I will have to see how it affects the tank if at all over some time but other then the higher alk reading i like the numbers-Kieth