Every fish has its own personality and will often behave differently than what we expect. Sometimes it is a good thing, like a typically-aggressive clown tang that is the most peaceful fish in the aquarium.
Other times it is a bad thing, as in my case here where an ocellaris clownfish recently transferred from a different tank decided that he needed to beat up a new Wyoming White clownfish. I did anticipate some aggression, but definitely not to this degree.
The new CITR PRO looks much more robust than the standard model. Instead of the small round drilled holes, it has nicely-machined slots to allow for better water flow.
The small suctions cups are also replaced by a versatile bracket that can be mounted to either a horizontal or vertical surface. This bracket is very thoughtfully designed and accommodates different aquarium rim widths (for standard aquariums, rimless aquariums or euro-braced aquariums) as well as allowing adjustment of the height of the container.