Well unfortunetly I think I have found the problem with my plants. I woke up today to find all but the two on the left hand side looking very bad. Leaves badly turned up, looking white etc and some of the plants looking very shrivelled.
Like I said in my first post, i knew the inlet valve was a little blocked with root mass, so i decided I would have to clear some of this up. Having tried my best to be careful so as to not shock the plant, the valve wouldn't budge and afterlooking very closely it was a lot worse than i thought. This has made me realise why the other plants are not looking very healthy!! The inlet has been blocked up so badly with root mass, that the nutrient isn't reaching the plants furthest from the inlet, hence the ones on the left hand side of the grow room are the worst affected, only the white widow and one of the maple leaf indicas look really heathy, those being the ones i suspect of blocking the inlet. In the end ive had to be quite brutal and literally pull out the valve to clean it. How far this will affect my two healthy plants I don't know, but fingers crossed they wil pull through the stress.
Do you think they will be able to survive, or could this turn them hermie on me???
Attached are some pics of the starved plants on the right hand side of the grow room, the other pic is of the root mass which came out of the inletvalve itself......eeeeewwwww!!!