You have some nice corals.
Please let me apologize ahead of time, as you may not appreciate my viewpoint. You asked for comments and in my opinion, the pictures are oversaturated and oversharpened. For me this creates an artificial feel which doesn't allow my appreciation of the beautiful animals in the pics to develop. A more natural, more accurate look would be preferable, in my opinion.
I suppose it depends on whether your goal is to create a popping image or to accurately convey the appearance of the animals in the tank.