mille base problem

[Briguy350]

everything in my tank looked completely fine until i came home and found my mille looking like this. cant tell in the pic but the top still has good color and polyps. i do not see any bugs and other sps look fine. i did have kalk in my top off and ran low and possibly coulda got a strong dose of kalk but nothing else seems to be affected. thoughts? nitrates 0, amonia 0, ph 8.1 dkh 10 , cal. 420 GFO/GAC

 

[fishmaster818]

everything in my tank looked completely fine until i came home and found my mille looking like this. cant tell in the pic but the top still has good color and polyps. i do not see any bugs and other sps look fine. i did have kalk in my top off and ran low and possibly coulda got a strong dose of kalk but nothing else seems to be affected. thoughts? nitrates 0, amonia 0, ph 8.1 dkh 10 , cal. 420 GFO/GAC

Ive been having the same problem with mine and out of nowhere so following

 

[Anavarchus]

Seen this before also, so would like to hear the thoughts on possible causes.

 

[TUSI]

Looks like RTN which is very hard to figure out. Did you have any swings of alk or temp?

 

[blufin]

It is not happy at all. It will probably die. It couldn't hurt to try to frag the healthy top piece and hope for the best.

 

[3Twinklets]

RTN. I agree with trying to frag the top.

 

[luke33]

That stinks, it's gone for sure. Like above, any Alk swings or have your phosphates creeped up?

 

[Briguy350]

Came home from work today and it was gone. I'm thinking a swing in my Alk possibly from the kalk in my ATO. I normally just add water every couple days but forgot and it ran down and might have got a big sludge of it. That's the only thing I can think of. All other corals and Mille are fine. Sucks it had such great color. I got dosing pump and will pump from a reservoir from now on controlled by apex and let ATO just top off fresh water. Happened so fast.