On 1st June, 2016 I had an experiment about the salt water and the fresh water. So the data show:
. Conductivity: 886 ppm
.PH: around 5.5 to 6
. Conductivity: 28 ppm
.PH: around 8
So which mean that our ocean now is getting a little acidic, and for my hypothesis is that people produce a a lot of CO2 and it bad for coral reefs.