Spongodes in trouble

[no1bubba]

Started out growing great now is in bad shape Three of five sections have died from the bottom up. Hope I'm sending a pic. Any one know what might help

 

[farfromsea]

Following since mine has some issues as well...

 

[AlSimmons]

What are your parameters? (Alkalinity in particular) Has this been bouncing around lately? Have you checked the coral for pests? (Nudibranchs)