Frogspawn base disintegrating

[BigGimp77]

So the coral skeleton of my Frogspawn seems to be disintegrating.

http://s18.postimage.org/w176hj37d/20120907_174506.jpg

I had something similar happen to a candy cane coral where the base of it disintegrated till it broke off and I had to re glue it.

Anyone know what causes this?

Its only happening on 1 CC and 1 Frogspawn. Other corals seem fine (2 different types of hammers, Torch, and another type of CC seem fine)

[disc1]

What are your calcium, alkalinity, magnesium numbers? Salinity? Etc?

[Neptune_Fan]

+1 first thing i would ask i what is you calc? good calc provides the skeleton structure for corals growth.

[BigGimp77]

I haven't measured it yet. I will test later when I get a chance (my test may or may not be expired though lol). Was just seeing if there is a known cause for this sort of thing. I've had this coral for over a year and its been fine.

[Sk8r]

How often have you fed it calcium?

My sig line carries good parameters for this species. Get your mg up first, then alk, then cal, and hold it there.

[BigGimp77]

I dose two part occasionally but have found that most of my parameters stay in check with good water changes.

That last time I checked my calcium was fine. I only noticed this deterioration recent and its only on 2 corals out of the 30ish in the tank. Everything else looks fantastic for the most part.