pH measuring and NUTE BURN

Growing some master kush and skunk cross

but having problems with nute burn and ph levels in the soil

ive already flushed my plants, and it hasnt help much

i just bought a ph kit and was wondering how i would measure the ph level of the soil?

what should the ph level be at?

any help would be great thankss

you need a soil ph meter u stick it into the soil there only like a 10$ on ebay.com as the ph of the soil im not sure but think it should ne around 6.0 not sure thro never tested mine

hope this helps bro