Practice makes perfect or so I was told. Also if you take enough pictures then one has to turn out good sometime. Fish are looking great even in the blurry shots as well.
thanks for the tips. I will try a few of these with the camera in manual mode.
all my shots so far are in the 'aquarium mode' with the exposure setting at -1 so the tank does not appear washed out (which it does in this mode if you don't adjust the exposure setting)