How long have you had the camera? Just curious, cause I think the red light is from a "red eye reducer" feature. It may be possible to disable it for your tank shots. Just a thought. Awsome looking tank, BTW.
Nice tank!
What kind of camera is that? I have a Sony Cyber-shot and it does the same thing. Sometimes it's cool, like shooting into caves in the rockwork, and sometimes it screws up the shot. Great for normal (Non Aquarium) shooting though.
Let me know how it goes when you frag the colt. I have a purply one, and it's gotten huge very quickly. I'll need to frag it soon, but have never done it before.
Good luck!