sps problem??!!

[escogs]

hello
I got some problem with my sps. you can see white bodies in the picture. some of my sps are like this. they are not dieing but loosing body colour. what do u think about these spss?
cal:430 mag:1410 kh:9 1.025 / 25-26C

 

[skratchiechan]

pest perhaps? goodluck

 

[escogs]

any idea?

 

[goettner]

Maybe there is something wrong with your lights or water movement.Just an idea, Pete