"Ocean acidification is not manmade global warming."
No, it is manmade ocean acidification due to the saturation within the ocean of human released acidic gases such as CO2 and SO2.
"Aside from that, refer to your 3 semesters of chemistry and learn that the ocean is alkaline, not acidic."
Duh.
"The ocean may becoming less alkaline, but less alkaline does not mean acidic."
I refer you to biochemistry 101. The alkalinity of the ocean has generally been stable for millions of years, as has the pH. As a result many organisms are adapted specifically to the ocean's alkalinity. The alkalinity of the ocean acts as a buffer to help mantain the pH. Now it is getting more acid (less alkaline - the pH is changing, with the ocean becoming more acidic), and many of those same species are now under duress, and some have succumbed. This is well documented.
"Hell ocean water hasn't even approached neutrality, much less acidity. More diversionary misrepresentation by your side of the argument."
It doesn't have to. Many organisms are adapted to a very specific range of alkalinity and pH. When you change those conditions, those animals suffer. Ocean water generally has a pH range of 7.8 to 8.4, with an average of about 8.1. Nearly all reef organisms are adapted to that pH range, and many only thrive in the higher end of that range.
From wikipedia - "Between 1751 and 1994 surface ocean pH is estimated to have decreased from approximately 8.179 to 8.104, a change of −0.075 on the logarithmic pH scale which corresponds to an increase of 18.9% in H+ (acid) concentration. By the first decade of the 21st century however, the net change in ocean pH levels relative pre-industrial level was about -0.11, representing an increase of some 30% in "acidity" (ion concentration) in the world's oceans.