Thats a pH problem, dont worry about the soil pH, I never do, just watch the pH of the water going in, I never even test run-off or the soil (those soil pH sticks suck and so do the drops for water, you cant get closer than about 1 full point with the drops) Also looks overwatered. Let them dry out, then water with pH 6.4 water/nutes from now on.
Running a pencil down by the roots could do more harm that good, just give them a few days to dry out before you put anything else in there.