Takes more than software there buddy! Trust me how the pic is taken and the software go hand in hand. Don't you have photoshop? Let's see some of your shots!!:bounce:
Ok here is the quick rundown:
Camera: Canon Digital Rebel XT (350D)
1. Turn off all pumps
2. Shoot at Night
3. Turn off all light/tvs in house
4. Use a Tripod
5. Shoot in the highest amount of pixs your camera will do (Largest)
6. Use the timer or remote to snap the pic to cut down on movement
7. Use a sports mode for fish, macro for closeups
8. EXPERIMENT with your auto and manual settings, white balance, ISO, Arp, etc...
9. Take LOTS, hundreds of shots
10. Pick the best shots and use a photo editing software to post edit, crop, etc..
Here is THE BEST site I have found for aquarium photography:
http://www.ximinasphotography.com/lessons/