Carbon question

[Myka]

Originally Posted by Canuckgod420

Does anyone know if changing carbon can cause a bleaching event. I replaced my 2 cups of carbon with fresh carbon and the next day half my SPS where white with no polyp extension, and almost all my LPS and rics where closed up. I dont get it, I have used carbon for years with no issues and this is the only thing I have done in the last couple of days.

Did you change brands? Did you change the amount? Did you rinse it first? How long since you changed it last? I essentially use a tad more than you per gallon as I use 300 mL on a 90 gallon tank, changing this amount out has never cause me any issues.