I see you are saying you have low PH.. you are testing it with a soil PH tester right. And not one for solutions. As soil will be like a massive filter and will take all the goodness out of your water. (Therefore the low PH) you don't have any ph issues from what I can see. Good luck.
@gottagrowsometime, Thanks for your interest! So I had some runoff from a watering and decided to measure it. Came in at 5.6 - growth had pretty much stopped already and had overall yellowing. Had this in my last grow too. I had been pHing my water and or nutrient solution to around 6.3. As a test I flushed the one in question and got the runoff to 6.0 then i stopped. Too much wasted water. Therefore will probably not flush anymore... Fix it in other ways... Cheers!
@amsterdammarijuanaseeds, thanks for the great genetics! Also looks like the Widows are gonna be Xtremely big! Just topped them for the first time yesterday.