VERY strange yellow stripes with wrinkling on new growth UNIQUE problem?

Look at this -- what is it? I had to post these pics because I never seen anything like it. Almost exactly 2 months grow under CFL.

The banding is a very light yellow against the darker green vein areas only on new growth-- hard to see in pics. Looks like a trace mineral deficiency? Maybe Zinc? Older leaves are fine--look at first pic while still under the gro lights. Clearly the old leaf is fine and the newer one above is wrinkled and has the bands.

You can see the veins are darker in the 2nd pic (WTF gro 4) in the new and maybe even the old leaves too!?! I'm FLUMMOXED!

What do you think. He said the Ph was around 6.5-6.7 but the Ph test kit he has is somewhat inaccurate / high error.

I thought a flush of salts in order? He been using schultz fertilizer 3/4 strength every watering for over a month. Waters every 2-3 days. I don't know.

Just wanted to add that I searched books, online, forums, etc. for days! Cannot find anything on this. Other people have posted about "striped leaves" but have no wrinkling on either side of the stripes or else the whole leave is deformed and yellow etc. Never both together as in these leaves. Is this a unique problem? (maybe I can patent it! LOL) HELP if you can! My friend does not think it is funny -- it is his first grow.

Seriously, he's got a look on his face like Whitey (Mickey Rooney) in that old movie "Boys Town" Carrying PeeWee after he was hit by a car. Now you have an excuse to watch that movie so you know WTF im talking about...

Maybe a better, more universal analogy is that he has a look on his face like Jack the Ripper just axe-murdered tiny Tim in a macabre reality/fiction warp of space time with crime history and the "A Christmas Carol" story. Even pre-ghost Scrooge would be shocked and apalled at tiny Tim being axe-murdered by Jack the Ripper, right? Maybe I need to lay off the Sativas a while...? Wow, did I just say all that out loud?

Anyway, help if you can. THANKS!

Kinda wierd? Looks like magnesium defishency starting to me cause the veins stay green an the leafs yellow from the topdown.
I Add 1 table spoon epsom salts to a gall of water an it should go away in a week. If Im wrong it wont hurt anything.
"Best range for hydro and soil less mediums is 5.0 to 6.0. Anything out of the ranges listed will contribute to a Magnesium deficiency".


heres another example, hopefully they look about the same.
View attachment 1207510

Thanks for the reply! The thing that freaks me out is the seer-sucker type wrinkling and puckering around the stripes. Never seen that before. Look at the lightest picture up there while it was under the grow lights. The one leaf is so puckered and wrinkled it is crazy. I thought it might be a Zinc deficiency, so we put a big galvanized nail in the soil. I told him I think plants are sexy, but I never thought I would actually nail one! LOL! Anyway, I will try your suggestion too. We have a PH meter coming also t verify PH. I am determined we will fix this. Thanks again.