awesome upgrade man! sounds like you got a wicked deal. whats the actual power consumption of that kind LED? you didn’t actually throw out your HPS did you lol it’s always good to have spare parts!
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320w.
Dont worry I still Have it 
as you say it better to Have spare parts… But I dont expect to use it ever again with led
sounds like you can start up a separate veg area or 2nd flowering area, or just use both to flower with !!
Photos from today. What do you think about those leaves if you can see anything I still feed them with powder feeding short flowering. Ec should be around 1.4 but I give them “only” 0.8. They are very dark Green so I supose There is enaugh N but still seems like they miss something. I am not sure…I started to spray them with vita Race from plagron (Iron mostly)
Is There any trick how to get normal Light photos Under led??
yes it’s really tough to tell with that lighting, perhaps if you could turn off the lamp and use the camera flash or something. some of my leaves look similar they were burned spraying method 1 pps with the lights on and only 12" away
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I tried to do some photos outside 
I am wory that There could be some Micro elements problem :-/ I Check the pH of runout water and it was 7.2. And intake water is 6.0… Whot the heck??
Only three plants show this on their leaves…the Rest is ok.
This is one of the best tests you can do. Good job with looking for the problem! I recommend flushing with 3 times the volume of ph’ed water. Than, wait until your next watering and check the ph run off again. Don’t change anything else, or you will not know which variable was the deciding factor.
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Few obvious issues.
A. 5.5 PH is way to low of a starting point. You want to start at the minimum of 5.7 and you never want to mix the nutrients any higher than that.
B. You moisture content is way high. Unless you are in an area like Colorado with an extremely low RH, misting is un needed completely.
C. You container size is also way too large in the beginning. You are never going to get a drying out period which is very important. The only way that can work from the get, is if you were to water at 5 to 7 day intervals. I would suggest using like a solo cup with many hole to make sure you are going to get complete drainage between watering’s.
D. Cork is NOT an inert product. Most cork oak woodlands occur on moderately acidic to slightly acidic soils, with pH generally in the range of 4.7 to 6.5 and, more rarely, 3.4 to 7.8. It will have some effect on PH however so slightly. If your water in is 6.2 and your out is not the same, blame the cork. Coco is an inert product
I am not sure what area you are in, but I would suggest for your next run changing your medium and go to a coco based mulch. It does not compact at all ever. It can be reused time after time and it gets better with age.
There are a few brands out there that will work straight from the bag. If by chance you are limited by space I would suggest a coco crouton. It is already broken up, very clean so needs no rinsing, and is very east to get established. Seedlings can get watered for the first week after transplant with a mixture of 1/4 TSP Epson salt and water PH’ed to 5.7 every other day until you have you first set of real leaves showing. Coco leaches out Magnesium and Sulfur naturally and Epsom salt is magnesium sulfate the exact ingredients needed to buffer the coco.
Couple of choices:
If you have an area to mix your coco, then use bundles of mulch. New coco will still need to be charged. I use like a 35 gallon “Brute” trashcan. They are BPA free and will not leech out any contaminates. I use 10 gallon of fresh water with a mixture of 1TSP of Epsom salt. Soak the block until it is fully expanded. After everything is broken up, pour off any remaining water let it sit for a day and it’s ready to use. You can even let it dry out completely as long as you have pre charged it, you’re golden.
I am not sure if your meter is on the .5 or .7 scale. If you have the choice, use PPM’s instead and stay in the range of 1300 to 900 PPM for Indicas, and 900 down to 500 for Sativas and you shouldn’t ever see any issues.
If you have any questions @ me and I will be happy to help you dial your system in.
Blessings
PJ
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Hi @LED_Seedz ! Thanks a lot for advice! I will try to answer on all of your points
A: 2 weeks ago a watered the plants with pH 5.7 and they all curled down. We thoth that it was caused by too low pH so next water was 6.2 and they were aboslutly fine. I am bit scared now to give them lower pH than 6.0 
Do you think that I should lower my reservoiar to 5.7??
B: Czech republic. This time of the year humidity about 60%. So you think I dont have to use humidifier? Or I shoudnt mist them with water? Or I shouldnt do any of those things except nutrition spraying two times a week? ??
C: OK. Next round I will start with regular seeds (no autos) in smaller containers for vegging phase and after 3-4 weeks I will transplate them in to the 1 galon pots I use now for flowering phase? Is it ok to use rockwool cubes instead of containers? Or better to have containers with coco and transplant in to coco?
D: Yeah the corc seems to be problem the whole time Last time I had pure coco with nothing else in it and Everythign was just fine…
What about the Epson salt? I never heard about this. So you say that everytime I start pressed coco fiber I should use clean water with that EPSON SALT?
My meters are calibrated and measure well. My resevoiar is pH 6.0 and ppm 560-700 (Ec 0.8-1.0)
But the most strange thing is that the plants are 60 days old and they are still not flowering. Not even one is showing any gender at all…
I flushed all of them 6 days ago with 30l of RO water ph 6.0 with a bit of Calcium (Ec 200 ppm 140) and the runoff was Ec 1420 pH 6.7-6.8 (ppm 990)
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Probably don’t need to foliar feed with hydroponics. And you almost definitely do not need to raise the humidity. The way humidity is usually measured is relative so you kind of need to know the temp and the relative humidity to make sense of it.
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Ok another watering is done (3 Times a day) and now the outake water is pH 7.5…I am starting to be paranoid It seems to me like more and more leaves Have Brown spots on them…Will see
Yes, no question.
You are over watering big time. Once a day at most on plants that size. I water once a day on 6 footers in coco.
Your plants are suffering from necrosis as well due to the PH. Keep you range from 5.7 to 6.1 and you’ll be fine.
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just curious if you know the EC/ppm of your runoff
I think you forgot about something you said elsewhere… Let them breathe 
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Yeah I water them 3 Times a day but thats only 500ml per day for 1 plant. It is not so much or is it? My friend told me that He had great results with this watering method. Do you that it is the mistake?
Ec was about 1320. I thing thats ok is it?
Ok, Don’t quote me for religion on this, but here’s what I think
I know coco isn’t supposed to completely dry out, but watering 3 times a day with very small amounts (500ml is just a little over 16 ounces) You are never pulling oxygen into the root zone like that. I like to water where I have up to 20% run off. In this way I am ensuring that not only am I flushing excess nutes that haven’t been used by the plants, I’m using the waters “suction” to pull oxygen into the root zone. I’m sure that my theory on this probably needs correcting but i’d take the advice others have told you and let them dry out a bit. Wait till some of the coco on top starts to turn lighter brown then give them a watering till 20% runoff.
Your plants are still trying to establish healthy root systems and by keeping them saturated they don’t ever need to seek out water. So let em use what they got for a couple days, then water 500ml all at once.
Someone correct me if I’m giving bad advice, but thats just my 2 cents.
Ok I will water them more but in Longer intervals. Like once a three day.
Another question: Is it ok to use drip needles? Or is it really necerssary to water them with watering can?
Do you think that these would be ok? I dont want to give up on my watering system that easily you know :’( 
That’d be a question for someone more experienced than me, I’ve never used drippers/blumats/etc
Until growth improves your plan for once every three days sounds good, on the third day before you water it, check the condition of the medium, if its still highly saturated, skip the watering.
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Ok its been 4d since Last watering and they were prety dry tonight. I watered them with RO water and with new nutrients I bought. I decided to buy Advanced nutrients Coco Bloom perfect pH technology. Ec 1500 pH 5.8. 1L per plant. Last Time I Checked the outake water the pH was 7.5. Today was only 6.4!! With the new nutes Hope it will work as the manufacture says. Will see in few days…
I also bought fan regulator with termomether but I dont know where to put the probe in my tent. Anyone knows pls?
Thanks!
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