Looks like the open brain is bleached (lost its beneficial algae for one reason or another). The beneficial algae, or zooxanthelate (sp?) are how corals process light energy. Since this coral is obviously not getting nourishment from your lighting due to it's bleached state, I would say that it needs very regular feedings until it is able to regain its zoo's or it will starve to death.
Thanks and God Bless,
The joy of the Lord is my strength!
Only bikers know why dog's hang their heads out of the window!
75 gallon (finally got water in it in late June)
40 lbs aragonite select sand
25 lbs live rock
10 lbs of base rock added 7-6-05
2 x Penguin 330 w/bio wheel
40 watt Powerglow