Different causes of bleaching

[Richyreefer]

Recently i added a trachy to my tank. I died within a week and shortly after the other two trachys i have had for over a year suddenly bleached. No other changes occurred in this time. Has anyone else had a similar experience? What other causes of bleaching have you observed other than light and what did you do to bring your corals color back?

 

[Idaho Lone Wolf]

Check your water conditions. Sounds like something is off in your water.
72-78° F, dKH 8-12, pH 8.1-8.4, sg 1.023-1.025. Check calcium, alkalinity and magnesium. Also check levels of anything you are supplementing (ie: iron, iodine). Are you doing your weekly water changes of 10% or more using RODI water and a good quality reef salt?