If you looked closely at the circled regions on this leaf, you will see a slight yellow/light greening occurring right beside the vein, its only present on a couple leaves and i only notice it under a magnifying glass, but it seems sorta splotchy and random in its showing, anyone fill me in on what this would be a sign of? I just fed them on wed its now fri 4:00 pm, and watered lightly with distilled water today. any advice, or am i just paranoid????? later,

oh i forgot to mention, i have searched for bugs, with and without a mag glass, and i havent found any traces at all. and i did touch them without washing my hands yesterday.