Leave promblems, NEED ADVICE!!

My plants are 4 weeks into veg. Now some of the leaves have started to yellow and wither. This started 5-6 days ago, right before I repotted and gave them their first feeding. I suspect low airflow and a bit high humidity has got something to do with it, since I didn`t have the vents going all the time. I`m now running them 24/7. Does anybody recognize these?? What can I do to prevent spreading??

How far away are the lights, and how hot does the growth area get? Looks to me like your nutrients you gave them were kinda strong... what did you feed them?

acutally..how close are you lights an what wattage..it looks like light bleaching..peace az

Thanx for the replies guys! I think maybe the Ph was abit too low at a moment there, hence the burning? It haven`t spread much the last 2 days as I can reckon, I think I`ve managed to level the Ph.
A lil`noobiness therr, with not measuring the water-Ph, I hope I`ll be "excused" for it later on

Azgrow said:

acutally..how close are you lights an what wattage..it looks like light bleaching..peace az

Click to expand...

Well 1-2 inches. But they floros so they aint warm. Plus the spots are on both top and lower leaves..