Mitts
I used a lot of the tips above with my Nikon 220S pocket camera and got some pretty decent results, nothing compared to Matthew's of course, but very acceptable for the equipment.

The paper on the glass trick to set the white ballance worked great! Before, trying to set the white ballance to "daylight" produced blan colorless photos and trying to manually set it against the white sand produced fluorescent artificial looking color. Now I'm getting photo's that actually look like what's in the tank.

I also got my best results using an ISO setting of 400 without too much noise. I didn't have a tripod, but braced my hands against the glass for support and managed to get decent macro shots without blurring.

I'll try and post some of the photos later tonight.

I doubt a shop light would have much effect compared to the high intensity lights we typically have over our reefs.