Hammer melting help

[hd dude]

I have a hammer that was doing great, last week it starting to melt, we test the water every other day and it is perfect.

Ph- 8.3
Ammonia- 0
Nitrate - 0
Nitrite - 0
calcium - 420
Alkality - 12
sp -1.023
temp 79.6

this was the first coral we put in the tank and would hate to lose it, the tank has been set up for about 7 months, and everything else is doing great. Also it is the same low flow spot that it has always been in.

Any idea's

Thanks for the input

 

[Thurge]

I was thinking that maybe your temp was too high (I lots a nice purple tip Euphilia that way when trying to force a RBTA to split) but that doesn't seem to be the case.
Gl hopefully someone will have some ideas.

 

[simonf]

Have you added any new livestock recently? Allelopathic interactions with leathers and other animals can be a problem.

Do you run carbon? new carbon could have cleared the water up too much/too fast causing too much light.

When did you do you last water change/how much?

Could it be starving? how much and what do you feed the tank?

Any other changes? new bulbs?

Simon