5 plants need help!!!

hi there, cheers for looking at this post! i need help my plants are about 6 weeks old there doing well but some of the leaves are going yellow and dying, i think this is down to nitrogen levels im using j. arthur bowers multi purpose compost which doesnt tell me the n-p-k levels and how much this compost has of it. im feeding them with bio bloom for now and in a week will have some bio grow for it.
im now on a 12/12 cycle with a 200w light if you could help me out will be much appreciated thank you!!

can anyone help us out with this? should i try and get some vitamins for the plants? boost of nitrogen?

looks to me like you spilled water/nutes on that leaf.... this can cause the spot affected to die...... I consider it normal for a leaf to get dry here and there.....

good luck

yea that sounds like it could be that to be honest you think theyll be alrite? cheers for the help dude

They don't look bad to me bro. Be careful not to over fert 'em. What kinda light you running?

think its a 250 watt its quite a nice light been passed about by alot of mates if you no what i mean