My advice for taking pics:
To get the best pics, I usually turn off my powerheads, keeping waterflow at a minimum. I also prefer to take pics with only the actinics on. Use the macro function on your camera (if it has one), and don't use a flash. If you crop the picture, crop the focal point of the pic before resizing the pic. Keep in mind that I probably take 10 bad pics to every 1 decent pic.