twistie necrotic leaves...

Have some plants on day 28 of Veg since rooted clones....they were left in the cloner for 30 days with no food just water, so that might be part of the issue but I don't think so.

CNS17 Grow
Pro-Tekt Silica
Drip Clean
H&G Roots Excel.

EC comes out to 1.2 (600ppm) (560ppm CNS, 40ppm Si)
pH is always 5.8-6.1

Watered once a day in 5 gallon buckets with Botanicare coco, till 20% runoff. (about a half gallon each)

Environment:
6000w HPS Air cooled, 18" from tops.
2 Ton AC Unit
1200ppm CO2
78F-82F canopy temps lights on, 70F-75F lights off.
55% humidity
Lots of air circulation.





I noticed the other day the runoff from all 10 plants was < 0.6EC when I was putting 1.2EC into them, along with the what looks like a bad Mg def, so I raised the feed to 1.6EC (800ppm) for the past few days and they don't look any different.

As you can see in the pics, they look a little droopy, and all have the leaf twisting and bad Mg def between the veins, along with being a light lime green color overall....I did use 0.2EC calmag+ for the first two weeks just to "charge" the coco with it, and I'm using almost the recommended amount of CNS17 Grow, so I'm not sure why the plants are showing this def. Don't think it's a root issue because they look fine, and don't think it's a pH issue since my pH is always 5.8-6.1 when I feed.

Keep up with the EC 1.6.

It looks like a few different deficiencies which would lead me to believe an under feeding issue.

Keep at the 1.6 for now.

I see Ca def, possible Mg def, slight N def on one,

With the size your plants are I would DEFINATELY be feeding at 1.6 I haven't found many plants in my room that require more than 1.6

But

With the addition of your Co2 you may even be able to push above 2.0 but take it steady, the added Co2 keeps them chugging along nicely.

I've seen a guy using Co2 running 2.4EC during the height of flower with 1500ppm Co2.



J

Thanks for the reply. I just wasn't sure where to start with the EC since this is my first time supplementing CO2 and half the articles I read say they need LESS food and water and the other half say MORE food and water with CO2. I'll keep feeding at 1.6EC, thanks.