are they sick

[ramirifi]

http://reefcentral.com/gallery/data/500/181449PC240415.jpg

one week ago i noticed that they are not closing good ( opposite way) and now some are bleaching , any advice!!

[ramirifi]

no one !

[divewsharks]

has anything changed in the tank since?
have you done water tests?

[madadi]

how often do you do water changes and can you take out the rock to dip it?

[ramirifi]

nothig changed , same parametes, except kh went to 5 , but fix it sinse 2 days .
yes i can dip the rock , what do you suggest ?
what make them pull down insted of closing upward ?

[divewsharks]

try this dip:
http://reefcentral.com/forums/showthread.php?s=&threadid=451720