Brand new to the forum scene with ph issue..i think

[DANKSY]

Hey everyone, been growing for a little over a year consistently..brand new to the whole "forum" thing. I recently just started having, what I think, is ph issues. I am getting yellowing thru the middle, older leaves that progresses with rust spots, witling and death of the leaf. I was wondering what ph i should start with and what should come out of the bottom of the pot? Since using an RO filter I have seen slowing of the rust spots but none of the leaves are greening up.. does anyone have any idea what this might be? thanks

 

[sgt. schultz]

Effected leaves aren't going to green up watch new growth. Sounds like something else. Welcome to farm.

 

[DANKSY]

Any idea on what else to look for? new growth is green and buds seem to be doing ok. just worried about larger leaves over the next 4 weeks..