Candy Cane & Open Brain Coral HELP!!

[hopperpa]

My, Candy Cane & my Open brain coral are turing White. I Feed them Marin Snow Twice a week with out the system running. I only leave on internal pump in the tank on to keep cerculation.
How Can I help these corals make it.....

 

[ipiniowa]

Have you checked your levels as far as PH, nitrates, nitrites, ammonia? How long has the tank been up?

 

[cristhiam]

Shade them, too much light will make them bleach, how long have you had them? what kind of lights do you have?