Question about ph AFTER nutrients .

So im using General Hydroponics's GO Box.http://generalhydroponics.com/site/index.php/products/general_organics/go_box/http://generalhydroponics.com/site/gh/docs/feeding_sched/GO-Feedchart.pdf
It says adjusting of PH is not necessary but after mixing it tests at 4.8PH with my digital PH tester. I have been having issue with lockout for what seem like no reason at all. Could this be my issue? I do understand that the soil buffers the water before the plant takes it in but with such a low ph maybe it's not getting to the proper ph level. My soil tests out to 6.5 and im using straight happy frog soil.
Sorry if the formatting is hard to read.. for some reason i dont have any text options or anything :/

probably not if you're using soil. Especially if the soil tests 6.5. What's your runoff at?

Put dolomite lime into your soil and never ph your nutrients solution it will throw it out of balance

I used go line for a year and a half i think alwayd had best results when i didnt ph the solution dont even check your ph

I Fox Farm Ocean Forest, and your PH should be 6.3-6.8 roughly Before you add to your plants! If you are getting a lockout then move your PH up to 6.5 and see what that does! i garantee you will see very good results!