Why are my plants leaves turning this colour?

Hey and thanks for reading.

My setup is 390W cfl grow with 3 130w CLFs
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Cooled with 4 fans
3- 110-140cfm *1 intake 2 outake*
1 (blowing on plants/lights at 70cfm)
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Grow is in Cana Coco medium being fed only properly distilled water.
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The plant was recently transplanted as a baby because the soil medium it was in
had fungas gnats. As far as i'm aware i've completely taken care of this problem.
There's no longer any visible fungas gnats.
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It recently started turning this colour after i fed it what i thought would be a small dose of CANNA COCO A+B
Mixed 1ml of each in a 1L of distilled water.
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The strain is Super Silver Haze.
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I'm thinking the issue was that i had it too close to the lights, perhaps too much light and perhaps too much heat.
To address this i moved it away from the lights and turned one 130w bulb off. (I have not waited long enough to see if this will produce a positive effect but will keep it like this for the time being.)
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I've supplied a picture which hopefully will help address the issue and i hope i've supplied enough information as possible.

Hope someone can help..
Kind Regards,
JJ

Looks like nute burn and maybe stunted and in shock.

Nothing but water for at least a wk.. The plant doesn't need any nutes. thats what it has the small round leaves for.

A plant that size IMO has never needed any type of nutrients. To me, its burn. Just give straight water and she will be fine.

For the record, I don't grow in COCO but I have seen that before in my grows with Roots Organics soil(which has a lot of nutes, at least for my plants) and with FF Ocean Forest. Ocean Forest being the worst of the two.

Light should not be an issue either unless you have it right on top of the plant. 12" away or more will be fine. You have plenty of light for that one plant.

Hope this helps!

is there too much chlorine in the water? I use tap water which is loaded with chlorine. I put the water in a big bottle and let it sit for couple of days.

IMO Your plant looks dry bro. I usually have all the dirt moist.

Shock maybe

Thanks for all your advice, probably right about the mute burn. Instructions told me to start feeding early and I gave them a heaps low dose! Ugh oh well that probably was it. As for the chlorine in the water theory as stated before I'm using proper distilled water with no chemicals or contaminants. Once again thank you everyone so much for your advice.

Hey just an FYI in case you didnt know but the soil you buy, like Roots or FF Ocean Forest, already have nutes in them. Normally a plant can go without nutes for weeks in veg ( at least mine do) without any nutes. The pics you show I think are from the soil you use, being too hot, too much nutes.

Just a thought---Try getting a lighter mix or mixing the one you have with another soil, example Fox Farms Light Warrior. I have never used light warrior and would not like to dish out advice without trying the product, but I read on this forum a lot that, that is what they use to half a hot soil ( in the organic thread at least ) that should help.