Eatting alive, I think.

Few days back I posted a thread "Chemical Warfare" Pic 2 is what they look like now, AWFUL! I moved them away from the other Corals, but it appears war was not the problem, I think their getting eatting, but by what? the spot circled was were a colony was, I vaccumed them right off, their base was all mushy! I seen several those pod bugs in the mushy area, even siphoned up 2 of them, why were they in there? do they eat Coral? or maybe snacking on the mess something else made?
Suspects, the crazy snail in pic 3, he has not left that rock for days.
Peppermint Shrimp, Emerald Crab, crazy bugs, Porcelain Crab OR is their another reason why Coral disappeared and the leather base turned to mush?

 

Sometimes corals just "melt" reasons on unknown.

I would move them away from the plate, the plate can produce long sweep tentacles that will destroy a coral down stream from them. Even one episode of sweeper tentacles from an LPS will damage a coral behind saving.

Amphipods and others will eat decaying tissues.

As a precaution look for nudibranchs at night.

 

I moved it away from the Plate, Really! they just melt? That's what it looked like to, like they melted, that's what I kind of thought they were doing there, eatting from the mess already made.
I guess when they start to melt like that there is nothing I can do to stop it? So am I going to lose my Coral

 

+1 on some times melting. in nature when coral "fight" for territory and space most will will expel their intestines and digestive systems and literally digest the rival away to the skeleton....pretty crazy....

 

I think I figured whats killing my blue waving hand, this morning what was left was acting normal and looked OK, I went out for the day and left my MH light on and my Coral was all closed up like the ones the died, the temp in the tank was 85 up from 78 when I got home and some of the other Corals are not happy either, so I think the warm water been killing them and this started around the same time the heat wave started now that a think about it.

 

Sounds like you have your answer. As awesome as a good light can be they can cause problems in the temp area. I was doing some research the other day and found that all coral have tiny micro algae inside of them. When the temp gets to hot the algae jets out to a different location or burns off from to hot of water or to intense of light. I hope you can figure out a solution to your system. Best of luck!

 

Try directing a fan across the water surface,this will only help if your tank is open top of course.You could also change your lighting period,using the halide only in the evening when the room is a little cooler.

 

Also look for a gorilla crab , might have got one as a hitchhiker, they only come out at night and eat everything.