seamadien, How you doing.. I'm new to this forum but not new to forums in general. So when I read a few of your post I thought well this person will be able to set me in the right direction.

So i'll start off by saying i've been running this strain for approx 8 yrs from clone and fem seeds that I made. The strain is a dutch passion blueberry crossed with a old school skunk #1. Not sure if that maters but I thought I would throw it in there.. Here is the thing, when I veg this strain under MH or T5's the plants show no sign of a deficiency at all. But when I run this strain under LED's I get a massive ca deficiency. I have no clue why it only shows up under LED's but I got 3 different types of LED units and it shows up under all of them.. The stronger the LED unit, the more the deficiency shows up in this strain.. I no this is not an LED section but I just wanted to give a background of my situation. I have vegged a few different strains under all of these dif LED units and most strains if not all won't have this ca deficiency just the old school blueberry cross that I love. Go figure lol.

The reason I think it's a ca deficiency only (but I could be wrong). It's pretty much at the top of the plants in week 4 of veg.. Now mind you I didn't know it was a ca deficiency only until I read some of your post.. It does start down at the bottom of the plant in week 2 or 3 of veg, but by the time it's in week 5 of veg (like the plants are now) it's all the way to the top of the plants.. Until I read some of your post, I thought it was a ca/mg deficiency so I added cal/mag plus, but it just seems to make the problem worse. might be getting nut lock from adding it IDK.

Now I no i'm not gonna be able to fix this problem on this run, i'm getting ready to put these girls into flower in a few days. It's just gonna have to be like the other runs under LED's with this strain lol all F'ed up. But I got new babies of this strain ready to go in solo cups. They have been under the led's for 10 days or so and not showing signs of the problem yet.. But I know in a week or two it will start to show it's ugly head again. I would kinda like to fix this problem this time or at least get pointed in the right direction and start fixing the problem and I feel I might be talking to the right person about this.

The first pic is the bottom older leaves and then pics 2 and 3 are going up the plant.. Pic 3 is 2 leaf sets below the top of the plant. The forth pic is the baby in a solo cup with no signs of the problem yet.. key word YET lol .

So here is what i'm using.

lighting is 600w LED for veg (2 300w units) and Flower I use a 600w 2K HPS on a mover

Dirt : Pro Mix HP in 3 gal pots

I use tap water left out overnight to evaporate the chlorine and my tap water is approx 130 ppm

Nutes: I'm using Botanicare pro blend for soil 15 mils

I use 5 mils of liquid karma every other watering

I use 5 mils of Ca/mag plus under the LED's only.. Seems I don't have to run the cal/mag plus under conventional lighting such as MH or T5's when I veg... Haven't been able to figure that out yet lol but whatever, prolly shouldn't be using cal/mag plus at all is my guess.

PH all mixed up is 6.5

Total PPM is 700 to 750 during veg

Dirt PH ... Sorry I have no clue. I could check run off PH if you like?

So it seems from what i've read of your post.. You recomend foil spray for a ca deficiency only. Any suggestions of what I should try? I'm so sick of the girls not running right under these LED's it frustrates the hell out me.. lol Hope U can help.

Thanks for your time.