White balance & dull photos

[Myka]

Thanks for the replies!

I am not shooting in RAW. I don't know how to process them afterwards. I only use Picasa for photo editing, I don't have Photoshop. I don't understand what RAW even is...

I shoot in manual mode. Usually ISO is 200 or sometimes 100. I try to use the manual WB button, but rarely seem to be able to get it very good. I try to adjust with Picasa, but often the pics are beyond help.

The tank I have the most trouble with has T5s heavy in the blue - no white bulbs at all - prob around 22,000K. It is also not very bright. Maybe I just need to swap out a blue for a white when I'm taking photos (pain in the butt).