someone please help

im three weeks into veg and the leaf tip on my plant is burning and the color is getting lighter and lighter but the veins in the leafs are still dark green a just flushed them for a week..... and its still coming i lowered my EC to 0.8 and was gonna build it up but still im having the same shit happening all over again!
the root system on them looks fine but still i dont know what my problem is.
im growing in a drip system.

Whats your PH at? I was having a similar problem and it seemed to be a PH issue.

Check this link, match your problem with the pictures.
http://www.icmag.com/ic/showthread.php?t=11688

Hey Zoobear my PH is at 6,0
Thanks alot Herbose! But it seams to me by this site (the link) that im having a Phosphorus deficiency but my leaves dont look like the one in the first pic where they show leaves with phosphorus def...they look like the one in the second pic and im not in flowering yet... pretty strange and of course the color of my plants is much lighter with darker veins.
I dont know whats going on with my plants i have everything right by the book.
Maybe its a ph problem like zoobear sad or is it zoobear? what ph do you have?

when I initially had the coloring problem, My PH was at 7.0 7.5. I'm now 6.0 6.5 and my kids seemed to be doing a lot better. I am also using soil, not HP, what Nutes are you using? Whats the temp in side the room? and whats the temp under the light? these could all be factors as well. =P

im using GHE Flora series my ph is at 6 my temp is about 30 celsius during light cycles and 20.6 lights off...