Just got my Canon Speedlite 550EX flash unit, and it's amazing what I can do now. It's such an awesome unit!! This is one of the first shots I got using it.
The flash makes it MUCH easier. I can shoot low ISO, high shutter speed, and the flash is brilliant at running on full-auto. This shot was taken with the entire camera on full-auto. I've never taken a tank pic that came out good on full-auto before. 8O
I've had just the one for a couple of months now. I've heard that this particular species can be aggressive towards conspecifics, so I didn't put another in. He eats anything and everything like a horse--pelletized food, flake food, chopped shrimp, even nori. He'll go at it. Gorgeous and hardy little fish.