Oops, Yellowing Leaves on an Auto?

I have a Tangerine Dream Auto about 8+ weeks from seed, ( Near Mature) and the lower leaves are yellowing and fading! Now The breeder says it's a 8-9 week strain so when I noticed it yesterday I wasn't too surprised as the few leaves were on the lower part of the plant below the Scrog screen, I just picked them off.
But today I noticed that it was spreading up the plant.
I'm in a hydro tub (Stinkbud LP system) the PH is 6.1 and nutes are ~1100 PPM using GH Bloom and Micro. I had thought the PPM was more like 800 PPM so almost 1100 is troubling, right?
I have it under a ~250 watt LED at about 12-14" so I doubt it's light burn.

I have heard of plans dieing back but it seems this is happening too soon, isn't it?

Pics please, could be the plant is in the final stages and needs a couple more weeks, could be a problem but, well, I'm not psychic but psychotic, I can't read your mind but can only fuck with it, more of a large than a medium, and that means I can't see what you can.

Well I finally figure out how to post pix!

Here you can seethe yellowing progressing.

For starters I would look here



but others will definitely be able to point you in exactly the right direction because I don't do hydro, but what I've just noticed is your pH and I believe you are a little high which could cause an issue as it looks like you have multiple issues there.

Your PPM is far too high. Either dump and make fresh or dilute this one. Is your pH stable or fluctuating?

I diluted the rez last night, used some down, and PH=5.6 PPM=883 this morning. but the yellowing is still progressing. PH has been mostly stable but rises slowly.
My tap water runs about 7-7.2 PH & ~500 ppm.. I generally 'down' it to ~5.6/8.

I'm not doing anything different than I have for 6-7 weeks and had no problems before??? StinkBud suggests PPM's 1500-2000 in his Aero Tubs? I generally keep mine under 1000-1200.

As close as I can tell it appears to be close to a potassium deficiency, but not quite like the pictures above. More GH Micro then?

I Emptied the rez and started over again last night. PH 5.6 PPM 950, but this time I added some Grow to the Bloom and Micro. I added the Grow to see if N was the problem. GH recommends ratios of 1 Grow 3 Bloom and 2 Micro in late flower. This morning it looked like it might be working. Buds are bulking up and getting sticky!