Nice pics. What cam are you using? Also, a good tip for you to help reduce the bluryness that you might get when doing macros, rest your palm or arm somewhere on the tank. I find this helps alot - especially since I shake like a clepto - lol
Which Olypmus are you using? Mine has a remote. I set the camera on the tripod and use the remote. Another tip is to turn off all the flow in the tank.