Now that you got your ph good, on to the next step.
Flush, completely...
Wait a day or two...
Then get some Aquashield on them roots, (3-4 ml per gallon of water)Along with 1/4 nutes.
Wait 2-3 days..
Get the nutes up to half
Wait again 2-3 days, and increase the nutes another 1/4 and so on...