Kent marine buffer PH and Alk issues

[Jack]

Low pH can be attributed to insufficient gas exchange. I can't remember if you have a sump or not but maybe point a powerhead to agitate the surface.

That alk is not high at all, nothing to be concerned about. Although it's higher than natural sea water this is what most reef tanks view as "optimium" (12dkh)

What are you using for testing pH, that could also be way off. With a pH of 7.7 I would think your critters would show signs of stress..?