How to care for Chalice showing white edge

[m0nkie]

Hello. I recently acquired 3 small chalice corals. 2 of them are doing great. One seemed to love my LED, and eating.. other one is hiding in the shade..

However, my 3rd one is shown white skeleton on the edge. It's at the thinnest part of the Chalice. I suspect it was sand issue. There had been a small pile of fine sand resting on it. I dusted them off, but saw a small white dot on the chalice. 2 weeks later, that one white dot turned to this white line.

Question: is there anything I can do to prevent further whitening? I have it under the shade. Low-Medium indirect flow

Ammonia, Nitrite: 0
Nitrate: 25
Phosphate: 0
Alk: 6.8
Calcium: 420
Magnesium: 1300

I know my Alk is low.. my rapid growing coralline algae is sucking it dry. I got my dosers and waiting for BRS to ship the 2 part..

 

[xdunaticx]

To me personally, that looks like growth, my monti's used to turn white before getting color and growing.

 

[fatboy40]

hard to tell from that pic .....do u see that white being skeleton or u see it as a form of bleaching ? hard to tell on pic thats y i ask .....i run a vey heavy chalice system and i seen low alk and low mag will recede my pieces ...

 

[m0nkie]

thanks guys. I really hope it's growing.. but i'm not so sure. The white part remained the same size from the past few days.

It doesn't look like bleaching. I have another chalice that's a little bleached. I placed it first in a none shaded area. That one has tiny white lines all over the peaks on the chalice (imagine a mountain peak with white snow up top). But it's been recovering since I moved it.

this chalice looks like it lost some flesh. As if the entire flesh of the thin part of chalice is gone. Maybe from sand build up? I will try getting a better picture if I can.

I'll be boosting my Alk this Thursday. hopefully that can help.