Went from healthy to not looking good in about 5 days

[Matejaman]

Hey all first time grower here appreciate any and all advice. She is about 6 weeks old I’ve been rotating feed/water/feed with general hydroponics flora grow 2-1-6 and cal/mag for 2 weeks now she looked fantastic until about 5-6 days ago getting blotchy yellowing in some of the older fan leaves and the new growth is went from lime green which I believe is normal but now they are more yellow. Flushed her 3 days ago tested ph of flushed water it was at 6.99

 

[Ninjadogma]

Looks like they're recovering from the stress of the flush. That should have helped move it the right direction. Remember to replenish the soil microbes post flush!