I don't know help

i am into my 4 days of flowering and water with nutes every week using half the does recommended on the bottle. I adjust my ph before every watering but these yellow and black spots are getting worse. What to do

so your method sounds right. Are you checking the runoff of your soil after watering? next time you do make sure to test it. Your ph CAN go screwy even with regulated water ph.

thx, how do I get the ph down in the soil then?