Help needed ... what have i done wrong

Looks like nute burn to me!

Bulldog i think you are right, i used to feed every water but since i cut that in half they seem better, i've read more on here over last few days and i think i need to flush them, is it ok to flush with normal tap water and then 1/4 strength nutes at 6.5ph or is it best to ph the flushing water as well thats the only thing i haven't out found yet.

I would flush them with ph'd water and hold off on the nutes for a few days

Cheers, i'll do that tomorrow and see if it improves the situation

@ caligirl, incl a pic of the miracle grow plant food label, seems to have everything you need to grow.

Did you buy a hydrohut...
that might be a problem.
ph is off.. what kind of nutrients u use?

No i got a room, nutrients are miracle grow plant food as i'm growing in soil.

Couple pics of room incl

Ur clones look fine, flush every 2 week, and the white crust is proabably salt build up u can just spray away with a waterbottle.

The white is an overdose of perlite lol, but i figured it wont do any harm as it just makes the soil drain more easily I'm hoping these will do better with all the advise i've gotten from here.

Lights are 600w hps and are kept approx 2 to 2 1/2 foot away, i've moved the small clones to another room with a 600w mh on them at 3 feet away cos they only young and made a shelf with 4 36w tubes above for making more clones. i'll post some pics of that tomorrow. The other rooms had a shuffle around with plants of a similar height grouped together and the lights adjusted to 2 feet and set on 12/12. should i switch to bloom straight away or continue the grow nutes and if so how long for? Its my 1st grow so i'm learning as i go but it seems to be going well or i've been extremely lucky lol