very nice tank!
by the way, there's a real photogallery on here to at
http://www.cichlidfish.com/tropicalfish ... otogalleryif you have problems uploading let me know.
For the picture you took of the entire tank, straight on, you might want to try and increase the ambient lighting, its hard to use flash straight on because of reflection back...but the more light the faster shutterspeed you can use to reduce blurring from movement.