Why do my plants look like this....? Weird..!

O.k., so all of these plants are clones, BLZ BUD and a strain I created months back by accident.
I seamed to be clued up about growing this stuff as I've used this site for a couple of years, thanks to all that helped me during this time..

First of all i think I may have light shocked them with the transplant from my veg room to the flowering room, also im not sure about the soil mix i am using, its a combination of compost and perlite.. the P.H. is just below 7, I've have used a multi-purpose feed that has a NPK of 7-7-7..

As you will se I have a multitude of problems, including curling leafs, light green leafs and basically the structure of the plant isn't great...






















The plant labelled the church is fine at the moment!!

Thanks for any advise and help...

Flush your soil. You've probably got a salt buildup.

I was thinking that as a last resort, but I only fed them twice with a diluted mix of feed, probably less than quarter dose feed...
My soil mix is nutrient poor when i first made it which makes me think that it doesn't need flushing..

I have purchase Empsom salts and Sulphate of ammonia to see if this will help, not too sure about using it now as ive heard stories that its not suppose to be good for Cannabis plants...

flush lots of water - double container capasity - use ph 6 water and at room temp