AK47 leaves

Hi all am growing ak47 they are 15 days old from seed today.the outer edges of the leaves just starting to slightly curl.Any ideas as to what might be causing this.My ph 6.30 and nutes cf 18-20.

Ps should of mentioned they are in an nft system with 2 air stones in the res

pictures?

Hi all any advice on the cause of the leaf curling welcome.Thought could be nutes to strong so lowered from (cf 18-200 to (cf 14-16) Am using a 600w hps aircooled light thats about 24 inches away but will lower over the next few days.

Usually when the tips curl up shows a heat prob ... whats the temp ???

Hi omega.

The temp is (28c) (83f)

ive got a similar problem with two of my plants i dont think its the heat causing it as the others are fine
my grows setupcompletly different to yours so fuck knows

Hi Oliwog.

What setup r u using.is it hydro or soil.

those are some fat little indica leaves
but 83F to warm get it down to about 75-77F

are the tips turning brown? if so u could have a magnesium prob. lookin good tho!

Hi Stylus. and daze4now

No not turning brown just curling.am going to try an lower the temp see how i go.will post some more pics in a few days see if there is any improvement.

Toke it easy.