Please help! :o

Wtf is this discoloration??
And also my leaves have cupped on some plants.

Help save the babies

Is it just light and heat stress cause I had the lamps too close?
Will they recover or do they tend to get worse even when the light is further away
 

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I use the dutchpro line with takeroot and multi total, the coco has mycorrhizae.
I've been slowly giving them more water in a circle around the base of the plant to improve drybacks and tomorrow morning they'll be ready for another watering.. finally to fill capacity with 20% run off and an EC of 1.4.
One of them looks extra dry because I took her out the pot to check on the root situation which look beautiful and white and have expanded well. However this resulted some coco which has never been watered to fall out the pot which I then dumped back on top right before i took the picture.
I can assure you the ladies still have plenty water and weight to the pots.
 
So basically I popped the seeds under t5's which went fine
Put the lights under a 4200k MH because they delivered wrong and its all I had at the moment
They started to grow a little more stretched so I put them back under these 45watt compact fluorescents which I've found locally.
However I think the lights were too close as a few ladies started to canoe.
Since then I backed off the lights and it hasn't gotten worse
 
I'd water them today with light feed. Coco != soil, you don't want to allow it to dry out.

Honestly they don't look bad to me. Good job for your first time.

Are you using their feed chart?

Thank you! Its exciting yet stressful , I'm using the stated ratios for their RO/softwater feeding chart.
I'll be diverting from the recommended EC as I'm supplementing Co2 when flowering hits
 
Oke so here's an update, leaves are still canoeing slightly.
I've ruled out most things so I think it's the low RH which is causing it.
Meanwhile they seem to be growing quite oke, some a little stunted I guess.
I have a few gnats flying around but nothing serious yet. ( I spot one every now and then )
They're now getting 1.6EC
 

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curious2garden

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Oke so here's an update, leaves are still canoeing slightly.
I've ruled out most things so I think it's the low RH which is causing it.
Meanwhile they seem to be growing quite oke, some a little stunted I guess.
I have a few gnats flying around but nothing serious yet. ( I spot one every now and then )
They're now getting 1.6EC
Your coco is too dry, wet it and treat for gnats now. You maybe seeing the beginning of an Mg def but coco grown plants will throw all kinds of weird deficiencies if you let the substrate dry out. If you like running plants this dry consider soil. I overwater constantly so coco is perfect for me, something to consider.
 
Forgive me if im wrong but what i've learned however is that dryback causes the osmotic pressure in the rootzone to be optimal again which results in rapid growth.
What's your take on this?
Your coco is too dry, wet it and treat for gnats now. You maybe seeing the beginning of an Mg def but coco grown plants will throw all kinds of weird deficiencies if you let the substrate dry out. If you like running plants this dry consider soil. I overwater constantly so coco is perfect for me, something to consider.
 
I know h202 works for the gnats but I'm afraid it will kill the mycorrhizae.
Does anyone have experience with a neem root drench?
Or perhaps citric acid, idk what works best.
Hypochloric acid I sadly can't get around here
 
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