Has anyone seen this!!

[Oscar Bravo]

My coral has been turning white and I really don’t know why. It’s not STN. It’s white but still alive. Alk at 7.3 and cal at 550 high as always. I have not change anything on lights

 

[LuisPerez711]

If the tissue is not falling off, my guess is that the coral is stressed and is bleaching. The zooxanthellae leave the coral and that causes it to "bleach".

Any rapid temperature changes? Maybe extra dosing that affected it negatively? By the looks of it, it is affecting the outer branches and not the inner ones. Not sure if I was much help but this will bump you back up.

 

[Oscar Bravo]

I did sold a big cap and been transferring other corals to my smaller tank. I shut down my calcium reactor so cal will not go high. I did see some of my other sps stn because of it but they stop. But this is different. My phos was at 0.04.
yeah a lot of my sps are not happy about the slow transition

 

[jurgenph]

could be a lot of things :)
nutrient levels, pests, parameter swings, some contaminant in your water.


J.

 

[TheDragonsReef]

Since you shut down your calcium reactor have you been supplementing anything for Alkalinity? You could be seeing a rapid alk drop and that could be causing the bleaching

 

[Oscar Bravo]

Since you shut down your calcium reactor have you been supplementing anything for Alkalinity? You could be seeing a rapid alk drop and that could be causing the bleaching

I have been supplementing so it would not dive.
i am thinking swings or nutrients