Taking pics and plants get another color

Hi,

I have a HP R707 5.1MP and i can take nice pics with it even with all in auto mode since im a complete disaster on photography.

Happens that everytime i try to take a pic to any of my tanks the upper leaves (wich obviously get more light) always appear yellow on pic; but they are green. Lower leaves appear with their normal color.

I have 216W hood with PC´s and T5 for a 53 gal tank (dunno if this will help or not).

Any recomendation, so i can take a pic and plants show the color they have ?

PS: the camera has tons of options available; i have tried to play around with it but no sucess at all (EV Compensation, White balance, ISO speed, AE metering, Adaptive Lighting, Color, Saturation, Sharpness, Contrast, AE Bracketing). I tried to mix all of this but heck.. always yellow leaves lol

Best Regards