the leaves on my ak-48 are curling, please help!

hi there people, im growin indoor, using 2-tube exolux bright-wing fluorescent light in a W75cm x D75cm x H200cm budbox grow tent, got 20 litres of water in a 50 litre resorvoir, ph tested at 5.9 with CANNA Hydro Vega A and B nutrients (160 litres in total) (80 litres of each)( added to the 20 litres of water ph 5.9) got maxi-jet pump mj500 pumpin 500 litres per hr, the lights on 18/6, the pump is on 3 times a day (during the lighting hrs) an hour at 4am another hour at 12pm and another hour at 6pm the lights on from 4am-10pm, after germinating i put 10 cracked seeds in rockwool cubes under the lights at a foot away after a week i put da lights down at 4inches above da top leaves, im at nearly 2 weeks this tuesday pics will b uploaded soon as i finish dis thread, my problem is dat da top leaves are curlin inwards, i thought the problem was that the light was too fa away at a foot now its at 4inches its still curling and gettin worst ...HELP!
Plzzzzzz! lol

LOL, Why'd You Post This In The DIY Section?

Ganjaglutin said:

LOL, Why'd You Post This In The DIY Section?

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check my join date, check the post date of my thread and ask me that again...

it was my 1st attempt at tryin to post a new thread, after i realised this is the wrong section for this thread i posted the same 1 in the plant problem section so make urself usefull n go there and leave a comment or sugestions or wat eva sort of info u hav 2 share

Hemp Guru said:

check my join date, check the post date of my thread and ask me that again...

it was my 1st attempt at tryin to post a new thread, after i realised this is the wrong section for this thread i posted the same 1 in the plant problem section so make urself usefull n go there and leave a comment or sugestions or wat eva sort of info u hav 2 share

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just to be blunt...i posted this thread the same day i joined, i joined to find a solution to my problem

To much water.

I had a similar problem with my plant where the leaves starting curling like a taco...just like the one in your pic.
My guess was that it was too close to the light, causing heat stress, so I raised it a bit.
That seemed to solve the problem. If the leaves are getting overheated, their response is to clam up in an effort
to protect themselves. I'm no authority so this is purely speculation on my part. Try raising your light or get some
cooler air blowing between it and the plants.

Torturedzen said:

I had a similar problem with my plant where the leaves starting curling like a taco...just like the one in your pic.
My guess was that it was too close to the light, causing heat stress, so I raised it a bit.
That seemed to solve the problem. If the leaves are getting overheated, their response is to clam up in an effort
to protect themselves. I'm no authority so this is purely speculation on my part. Try raising your light or get some
cooler air blowing between it and the plants.

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i had a few replys, most sayin nute burn, iv flushed em n usin jus water ph 5.8 and after a few days now they look like they gettin better i hav a fan and my lights are at 4 inches high the temp is around 80-85 F

That is heat stress. See the leaved taco-ing. You need ventilation. Do you have an exhaust fan in your tent?

Early said:

That is heat stress. See the leaved taco-ing. You need ventilation. Do you have an exhaust fan in your tent?

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i have a fan that i switch on sometimes but since last weekend i have been using it during the lighting hours the temp right now is 80-85 F