Same diagnosis or different?

Hello guys! I have a problem(
Stated about 6 weeks ago, in root riot, moved to coco coir pots (solo cup size), they were way too long in solo cups so they did a little root bound when I moved afterwards moved them into 20 L buckets. After 2 weeks when they just started to grow vigorously they started to show different symptoms photos below. Could they just started to choke themselfs with roots, or is it a myth?

In addition:
- cheap coco bricks (flushed couple times)
- 5.8 - 6.0 PH, PPM 400-600 from time to time tap water 70
- 300w per m2 of samsung F series
- very little air movement
- local grow nutrients without calsium so I add calsium once a week.
- AK-47 and White Russian

Could it be because I add too little of calsium? And the main question are plants showing same problems or different?

First plant started to show signs on new growth 4 days ago just like from a light heat stress, now they are really drying:




Second plant just started but it's different:




2 days ago this one witch was one of my "best"

Cannot edit the post one more thing about the last one - yellow bottom leaves are just too old that I did not cut.

What nutrients? Whats the NPK?
What distance is the light from the plants?
How big are the buckets and are there lots of drainage holes?
How often are you watering? With how much? What do you mean feed 400-600 from time to time, 400 all the time and 600 every now and again? Or just 400-600 every so many waterings?

Those coco bricks need thoroughly washing, preferably soaking for a day and then re washing with a hell of a lot of water.
Have you checked the ppm/ec of the run off?
How are you measuring PH? What meter or method?

Shit ....
Jack 321 youtube
Add fan and everything lol

coreywebster said:

What nutrients? Whats the NPK?
What distance is the light from the plants?
How big are the buckets and are there lots of drainage holes?
How often are you watering? With how much? What do you mean feed 400-600 from time to time, 400 all the time and 600 every now and again? Or just 400-600 every so many waterings?

Those coco bricks need thoroughly washing, preferably soaking for a day and then re washing with a hell of a lot of water.
Have you checked the ppm/ec of the run off?
How are you measuring PH? What meter or method?

Click to expand...

Distance from the light about 15-20 cm
Buckets are 4 gallon, drilled plenty of holes last grow went almost perfectly in them but last time I used perlite/coir 30/70
Watering 1 times in a week 1 gal per plant with 500-600 ppm calsium added, and every second day 1 litre 400-500 without calsium.
NPK 2-1-6
PH double check with pen and liquid test

Did not check the run off PPM, I'll do tomorrow, thanks for hint!

swedsteven said:

Shit ....
Jack 321 youtube
Add fan and everything lol

Click to expand...

You really think that air circulation could be the possible reason?

AngryMexican said:

Distance from the light about 15-20 cm
Buckets are 4 gallon, drilled plenty of holes last grow went almost perfectly in them but last time I used perlite/coir 30/70
Watering 1 times in a week 1 gal per plant with 500-600 ppm calsium added, and every second day 1 litre 400-500 without calsium.
NPK 2-1-6
PH double check with pen and liquid test

Did not check the run off PPM, I'll do tomorrow, thanks for hint!

Click to expand...

500 -600 ppm of calcium? Why so much? That's way too much. Your lights are also too close. 20 cm is only about eight inches. You have more than one thing going on there. Plants that size in coco need to be watered daily with a balanced nutrient solution until slight runoff. You're likely letting the coco dry out. Get yourself some Jacks, Megacrop, or other easy to use nutrient that has everything in it. Start using it and hope for the best. But to be honest some of those plants look beyond saving.

xtsho said:

500 -600 ppm of calcium? Why so much? That's way too much. Your lights are also too close. 20 cm is only about eight inches. You have more than one thing going on there. Plants that size in coco need to be watered daily with a balanced nutrient solution until slight runoff. You're likely letting the coco dry out. Get yourself some Jacks, Megacrop, or other easy to use nutrient that has everything in it. Start using it and hope for the best. But to be honest some of those plants look beyond saving.

Click to expand...

i mean 150 calsium once a week
Beyond saving?
You mean the first one?
What if I cut the dry top off, or is it totally gone?

It looks like all the new growth on the first one is dying along with the rest of the plant. I wouldn't bother with it myself. The others are not looking good and will probably get worse before they get better. Your light is too close and I have no idea what you're dumping on them but it's not doing them any good. What are "local grow nutrients"?

Runoff is 300ppm bigger than the nut solution

xtsho said:

It looks like all the new growth on the first one is dying along with the rest of the plant. I wouldn't bother with it myself. The others are not looking good and will probably get worse before they get better. Your light is too close and I have no idea what you're dumping on them but it's not doing them any good. What are "local grow nutrients"?

Click to expand...

I'll try to save it cos dont have a lot's of girls =(. Distance from the light now 30 cm. Changed feeding to GH Coco, lets see if it helps

try posting a photo at buddy.kindbot.io
Buddy thinks it looks like heat stress because of the cupping of the leaves perhaps related to light burn.
More ventilation and air circulation will help keep the leaves cooler