Yellow leaves

Plants lower leaves turning yellow on3wk old auto fems ph is 7.0 7.2
Leaves get yellow on edges and tips leaves look veiny

hi id say ph is borderline, is that run off? also if you can put a picture up it would help people advise you, also more info, soil feed {if any) temp set up etc etc

Thanks that was r/o soil is a organic mix not miracle grow 300watt led plus some out side light 18/6 I think I over watered will get pics soon look good top leaves bottom yellow and curling but not dry but turn brown would it help to flush with nutes pots are getting dry

Cannot tell what there def in or not at all thanks for the help yes I'm new at auto's