HELP - PH Problem, Nutrient Deficiency, or Both?

[Wink]

Strain: White Queen
Media: Perlite
Method: Flood/Drain 3x week
Nutrients: Mega Crop + 1/2 recommended dose of additional Cal-Mag

This is a bit of an experiment after my Coco Grow with the same strain. Have a look at close up shots of the leafs. They didn't experience this when grown in Coco. I've tried maintaining PH at 5.5-6.0 and also from 6.0 to 6.5. It doesn't seem to matter what PH range, same leaf problem. I have 2 of a different strain i'm feeding the exact same nutrients (in Coco) and they show no signs of this, they look great actually. Any ideas?

[SirSmksAlot]

I'd try giving the full dose of cal mag. Looks like calcium defency imo.

[Wink]

I'd try giving the full dose of cal mag. Looks like calcium defency imo.

Thanks for the reply. I was hesitant because Mega Crop includes Cal-Mag and I've been adding more Cal Mag to it. I thought the same thing, but was afraid of overdoing it on the Cal-Mag.

[alltatup]

I think it may be nutrient lockout. I let the pH in my hydroponic reservoir fluctuate between 5.5 and 6.4. I don't quite understand how you are doing your pH. I would say give them a good flush and allow the pH to fluctuate all the way up and down, not just half way.