Anyone care to identify this?

Not sure what this is, if its some sort of nute burn or what. i just switched to hydro, i am using GH 3 part and FF Kangaroots/Microbe brew for benies. The leafs curl up and get dry to the touch.

need more info. Looks like Calcium deficiency but that doesnt necessarily mean you should add Ca. Several environmental factors can interfere with the plants ability to uptake nutrients. Temperature stress either at plant level or root level, pH ranges, pests, nutrient toxicity, fungus and "slime" etc...

it could have been to hot and not enough moister it also looks like there are some white spots which can be caused by bugs (Spider mites)

I dripped some nutrient solution onto one of the leaves when i change ice bottles. The temps range from 72-82f, had some root slime when i started (res temps we're 80-81, now i keep them 64-69f) No spider mites, the RH is around 35%. PH is kept between 5.5 to 5.9 (i try to stay close as possible to 5.5) i did however notice some of the other plants had almost a nitrogen toxicity color, very deep green but the new growth is lime green and hauling ass. these leaves we're fine a few days ago, i clipped off a bunch from before that had the same issues and now it seems to be returning again but to the older/lower leaf set. I am in week 3 of veg under 400w MH (600w dimmed) running 590-600ppm (320ppm base tap water) with equal parts of Micro/grow/bloom and some Kangaroots/Microbe brew to keep slime away.

Heres some pics of the plants.

Well, i am assuming its nutrient burn... unless anyone else has a theory

Your ppm is pretty low for nute burn.. I'd say Ph or deficiency. The black spots make me think of Phosphorus deficiency.. what nutes (and NPK ratio) you run?

Edit: noticed you run at 5.5? Yeah that low and you lock out P.

i was using equal parts micro grow and bloom from the GH Flora series. I did 7ml per gallon of each, GH Feeding chart suggests 10ml Grow (2-1-6) 7ml Micro (5-0-1) and 2.5ml of bloom (0-5-4)

i'll pump up the PH to 5.8 and see if that cures it


just checked, the one bucket i normally use to check temps read ph of 5.65, i pushed it up to 5.8 and the rest are already 5.8 - 5.85. Seems to be affecting one strain while virtually not effecting the other strain.