please help diagnose these problems

hey guys and gals i got some plant problems hoping someone can help me diagnose the 9 i have flowering are yellowing on the tops from the center outwards and the bottom fan leaves are yellowing and falling off litterally over night up to 5 big fan leaves are falling off the bottom of each plant my soil ph is 6.5 i water with well water from my house and adjust ph to 5.8 i dont have a ppm meter but i know my water is hard water and ph out of the tap is 8.8 my last crop did this same thing but did it late into bud i attributed the yellowing and loss of leaves to budding but these girls have just had the lights changed to 12 hrs about 3 weeks ago and are already yellowing i flushed the soil right before taking these pics about 4 days ago the yellowing hasnt improved but has seem to slow and or stop for now i use advanced nutes 2 part formula using the a and b grow right now havnt purchased a and b bloom yet strain is uk chesse also my rooms gets up to 110 degress sometimes for a couple hrs could this be heat stress the leaves dont show signs of heat stress and humidity stays 40% at night 25-30% with lights on for the most part temps hover around 75-83 but like i said there are a few hrs a day of 100 degree temps i have a couple of this same strain in bubble buckets doing fantastic and using the same water i use to water the soils plants with so i really kinda stumped ive tried epsom salts for the yellowing but it hasnt helped also use myco madness bennificial micro organisms alond with the an 2 part formula think ive covered all angles feel free to ask any questions on details i may have missed



nute burn or heat stress i had these little ladies outside temps were around 105 degress when this happened i transplanted then the night before into bigger pots did not add any nutes and then the next day was super hot when i got home they looked like this at first i thought heat stress/burn but it looks to me as though its nute burn could my soil possibly have been too "hot" for the little ladies

--bump....

BURN!

any ideas on the bigger ladies with the yellowing centers those are deffinatly not nute burned but still have no idea whats going on with them seems to be some kind of defficincy but i have no idea what

no one has any ideas or suggestions as to what it could be? im here to answer any questions you guys might have if i didnt cover all the details im more concered with the bigger budding plants that are yellowing. kinda figured those smaller ones were nute burned will the smaller ones recover what should i be doing to them now that they have been burned ive just been using water on them no nutes the new growth on them doesnt show signs of nute burn

ya dude you burned really bad and got lockout of other nutes. flush like a mfer and give them time. Then after like a week and a half or two weeks you can gradually start. with 1/4 nutes and see how they respond. By the way late in flowering you need to be using flower nutes but also like 1/8 veg nutes to keep nitrogen lvl up otherwise u get yellowing and browning

oh i just looked at picture of the plant on top that light green color is just the new growth dude some strains look that way give it a like 4 days and the lime green leaves will turn dark green