New growth curling down and yellowing, HELP

E-indoor
E-hydroponic
E-Rockwool
HCL-Ebb and flow
E-Tap
E-6.5
HRT-Source water EC, unknown
E-4 weeks
E-Advanced hydroponics 3 part
E-flood 4 times/day recommended dose
E-600W HPS 28 inches
E-14c/22c
HD-room temp
E-40/70
E-12/12
E-Extractor fan, passive intake, oscillating fan
TR-No, I had a ph problem at the beginning but it seems to be ok after numerous flushings



It looks like something is eating my leaves, in random places, there is no discoloration or anything just chunks of leaf missing. I have used organic bug spray for a couple weeks just to be in the safe side and under close inspection there doesnt seem to be any bugs, i dont have a magnifier though.

They went into 12/12 on sunday and since then iv been having problems
The top growth has virtually stopped and new growth is curling down and has a texture almost like cabbage

Ok i read something about nitrogen overdose and they seem to have the symptoms of this, so i changed the resevoir to half strength, Will this help? Anyone?:(

Anyone got an opinion on this??

this may almost sound a bit slow...
but...
look at the shape of the sides of what you're calling "chunks missing".
Do the two sides roughly match up?
I had this kind of thing when my night temps went real low and I was over watering the girls..
they'd shrivel up a little claw like with the lights off and the temps in the low 40's, and when the lights came on, they'd almost POUNCE at the light and end up around the 75-80 mark.
It may have been my imagination, lack of experience, and maybe just a bit of general full of sh!tness... :D but these leaves seemed like they were tearing with the stretch.
Had nothing to do with PH and temps in the end.. but then again I'm an organic/soil boy so my 2c may be worth nought.
Good Luck
JJ

No the chunks missing are not opposite each other of even on the same leaves, theyre completely random. The lowest temp i've recorded is 12c/53f no where near what you've described.
To be honest its the curling and growth stunt that im most worried about
Thanks for the input

Im really worried about this so bump for my american friends:bump2:

Bump for someone in need of help!!