Need help asap my baby is sick leaf curling

OKay i recently started back in soil just cause didnt like hydro exprince so i started with bio bizz all mix and sensi grow a and b eveything was fine the recnetly when i got ready to switch them over to flow the leaf started curling up i checked p.h it flux uate but its no higher then 7 usally around 6.5 water is ph with advance nut ph down to 6.5 i using sensi grow a n b along with flower a b with a hint of bud candy and carbo load havent gave them anything for a week now just ph water can some one help

it could be heat stress whats ya temps like
and i dont think you are spose to use the grow and flower at the same time but ive never used sensi i could be wrong

looks like they are curling upwards.am i seeing this right? if so, it really looks like heat stress.