Some mineral def. I know it's not nitrogen or magnesium, and those are the only two I've ever had to deal with. http://www.icmag.com/ic/forumdisplay.php?f=83 Ask there you will know right away. Good luck with your grow.
thanks for the help, but i cant get a ph meter around here...im in the stix...i guess ill order one and just keep doing what im doing untill it gets here......
Maybe you can study up on it and figure out if its high or low by the symtoms and act acorrdingly. Or maybe its a mineral problem, are you using any nutes.