what th best way to bring ph down?

[baron1212]

Hey guys what can i use to add to water to being down p.h. .My p.h. is at 7.1-6.9 i use organic ferts.I have used lemon juice in th past but need sum thin else not working well.Apple cider vinegar?how much per gallon

 

[baron1212]

please delete thread i understand now why noone answered.shouldve read more