Help,Pics of 4 week old plants/clones changing color in spots

Hey hows it going,i got 3 new clones from a good friend about a month ago.The strain is A-train. I got them from him in 4"rockwool cubes rite after they had rooted and i put them under a T8 like i always do for a few days then under a T5 for about a week. I then transplanted the cubes into 3 gallon white square pots filled with Fox farm ocean forest soil like i always do for new clones i plan to grow into mothers. I then put them under one of my 600 HPS about 2 1/2-3 feet to get them use to the stronger light.When the clones were little they were good and green like all my other plants,after they were under the 600hps for about a week or so some of the leaves started showing a little funny growth and the very top blades were very thin and spindly. My veg room is 13'x11' and at the time i noticed the funky new growth and some of the change in leaf color the humidity had been really low,around 28%..so we invested in a big cool mister that brought the humidity right up to about 50%...Like i said these mothers are in 3 gal. pots filled with Fox farm ocean forest mixed with maybe 20% extra perlite...the soil ph is neutral,the run off water is 6.2..i usually feed my plants the flora nova with the rest of Gh lineup and a couple other supplements.But i was out so we had got some Botanicare Pure Blend Pro and liquid karma sample bottles i thought i would try out. So i started feeding with those two products at about 1/4-1/2 strength until i noticed the problem then i added Cal-Mag plus, Sweet berry and Silica blast,and now i'm feeding a little stronger about 1000-1100 ppm with PH at 6.2.We also switched out the 600hps for a Mh conversion bulb for veg. It seems like the new growth on the 3 A-Train clones gets better as it grows but then them leaves will slowly do what they were doing before,i'm just stumped,because i have about 70-80 really nice seedling plants that are starting to grow pretty quickly"some getting around 4-5 inches" and they look perfect.Iv'e been growing diff. strains for about 10 yrs or so and never once had a nutrient prob.,so i never had to trouble shoot. If someone could look at these pics and let me know what u think that would be greatly appreciated!!! Iv'e also never put a 4"cube and buried it into the soil,the clones are usually in the 1.5" cubes or from one of my EZ cloners.Maybe them cubes are staying to drenched"doubt that's the problem,but that is somethin i usually dont do. Sorry for the ramblin,just wanted to give as much info as i could and this is the 1st post iv'e ever put up,thanks

sorry,just noticed how small pictures come up.I emailed the pics to myself from my phone camera..But on a couple of the pics where it shows the big leaves with the goofy discoloration,that's what some of the new growth turns into and some tips curl....deficiency????? Like i said,iv'e never had a problem with somethin like this in 10 yrs of growing diff. strains. I thought it was maybe just the genetics but the guy i got these from has no problems with his at all

Hey thanks for ur input Ghetto Grwr. but those 80 seeds we ordered were actually just transplanted into those 32 oz. sty. cups 3 days ago,they just look like little cups in the pic man. And we figured out the prob..with them 3 we were gonna mother.Them square white pots we had layin around are real thin,the light was penetrating our roots through the side,we transplanted them into our 5 gal. black buckets,their up n poppin again,we kept the best 1 and put the other 2 into the big girl room where we had a little spot left on a tray and said fuck it.Cali style 4 all u Kali kats