I need help!

[cannabannana]

Hello!
this is my first grow, and ive got all the equipment i need : growing tent, fans and filters and a 600w hps etc. i had a problem with the electrisy, and lost all power so that the lamp and the fans were shut off. But just for 1-2 hours, in that time the temp inside the tent dropped to 5c.
after this the plants have been growing slower.
usualy i keep a stabile temp at 24-25c

i have 12 plants,moste of them is ca 10-12cm BUT they are Realy Yellow in the senter of the plant. what could be the reason for this ?

and how high should my lamp be hanging over the plants ?

I need help fast!
altso, how do i uppload pics ? so you could se what my problem is.

Thanks :)

[cannabannana]

i forgot to say what im growing.
12x Purple#1 seeds from Dutch Passion.
if that has anything to say:)

Again, thx for the help :)

[TurboALLWD]

your right on one thing, you need help! start by moving the lights 12-16inches away, especially if you don't have an air cooled bulb. First thing is what's you're ph? second is, post in the plant problems section and use the form to fill out everything you can so more experienced growers can actually help you. Lots of plant problems are caused by ph so make sure you have that right and move on from there. I've been 90 percent problem free just by keeping my ph somewhat stable and flushing my plants in soil..

[cannabannana]

i don't have a Ph meter, but ima get one asap. but untill that, what can i do ? they are getting more yellow every second, some more than others. untill they just dry upp and curl the blades, starting from the tip off the leaves. i seriusly need some answers, i know its not to easy as i have no control of my ph etc. but HELP!!! there must be a simple reason for this. ive lost 3 plant so far, beacuse they are getting burned. and ive raised my lamp to the top of my tent (2m) what to do next ?
peace:hippy:

[Nikolaus]

Aren't they being overwaterd??

[Weedhound]

What kind of growing tent are they in? Is it a hydrohut?

[Weedhound]

and fill out the troubleshooting form. I cant even tell if your plants are in soil or hydro so how is anybody supposed to know whats wrong with them?