Curling Leaves, kind of pointing upwards.

[pure haze]

Hi everyone, i've got 5 plants, 2 lemon skunk 3 trainwreck and all look pretty good apart from one that seems to have stopped growing. The pics of her are at the end. My main reason for posting is the slight curling i've got on my leaves. My details:

Hydroponics
Indoors
Greenhouse Seeds - Lemon skunk & Trainwreck
Just under 2 weeks old
2 300watt CFLs - 1 red 1 blue
3 inches or so from the lights

Nutes:

Canna Aqua Vega A & B

Week 1 - Almost no nutes, and rhizotonic for root growth
Week 2 - Less than 1ml/litre A, 1ml/litre B, and rhizotonic

Week 3 - I drained the tank today and changed the water. For 17 litres of water I put:

20ml Vega A
20ml Vega B
40 ml rhizotonic (full dosage is 4ml/litre, which is 68ml for 17 litres)

My ph is fairly constant, I've got a digital metre and keep it about 5.8.

So I just upped the nutes and i'm wondering if this is a mistake....and my leaves are curling inwards!

Pictures 1 - 4 show the curling leaves

Pictures 5 shows my 5th trainwreck which is really doing badly....crinkles leaves aswell...

The first set of leaves on my healthy plants is now quite wrinked...what might this mean? This is in picture 6. By the way the flash is on in picture 1.

Thanks everyone

[TexarkanaTim]

Everything sounds pretty solid. Nothing to really worry about, the crinkling you described isn't a big deal. It looks like tinfoil under the plants for reflection....if so, get rid of it and use mylar or something flat white. Tinfoil can cause hot spots, which could have something to do with your curling leaves.

[pure haze]

i put the tin foil there to stop lighting getting through to the roots, i know about the hotspots, i'm hoping the plant canopys cover up the tin foil soon...

thanks

pure haze

[slanesh]

i may be wrong but i'd say the plant in the last 2 pics is brimming with nutrients and doesnt need any more for a while or you may burn it.
i think that because of the darkness of the leaf. if im wrong. please let me know. im trying to learn as fast as pos.

[jdubg23]

my plants leaves curled up like that-looked like a canoe... my temps were in the low 90's. make sure you measure the temp at the canopy and not at the pot or ground

[SmknVTEC]

Yes plants in those pics show slight heat stress.