Not your every day problem i dont think

I've been growing for a while and this is the first time I've come across this problem and I cant find a solution. The only problem I'm having that could possibly cause these symptoms is a fluctuating PH with a res change I did 2 days ago, whichI did about two days after the symptoms began to occur. right now ph is 5.6 and will fluctuate up to 6.3 the pics are in order of progression of the symptoms. Any opinions or advice is GREATLY appreciated and will get +rep...

Well you're certianly burning your plants.

Re-check how much nutes youre giving them. (They're only small plants) 1/4 dosage max. Meanwhile, mist with plain water several times a day.

Careful if using pHdown, this can burn too.

Looks burned to me!

I agree with the above 2 people. What is your EC level and what PH are you aiming for every time you check/adjust. I see you said its at 5.6 right now but i would aim for at least 5.8-6.2 range.

thanx for everyones replies...it ended up bein lockout due to extreme ph fluctuations. im only nuting at 120 ppm...i got the ph to stabilize at 5.9-6.0 and they have recovered and resumed growth