new leafs growing slow and twisted

hello all , im growing white widow they are 2rd week in flower and my tops have started to grow small leaves that twist and generally look shit the colour of the leafs are not yellow but not the dark green im looking for, my ph was a little high so i flushed them for 2 days bringing it back down to 5.5 from about 6.9 the cf/ec was 14/16 when the ph was 6.9, i had one plant out of ten thats tops started turning yellow but its started to perk up but not much, i still have the slow growth on all the tops with tiny leafs sprouting out and some twisting.
some are making a claw like shape ive added pics , can anyone advise me as ive got very little hair left to pull out

more pics ............

Looks to me like they just are shocked a little from the ph change. They should be back at in in about a week. EC will change as they start to eat and get over it.