Red Monti Caps losing flesh?

[Tink]

I have 2 red monti pieces that are having issues, both have been in the tank a few months and doing well. One is almost totally gone, and the other has 2 specific spots not doing well that are slowly growing in size.

 

All other caps are doing well, so what gives?

 

Are the red variety known to be more delicate?

 

Each was on opposite sides of the tank, so I don't think the issue was local.

 

 

Sorry for the blue tint

[Tink]

Here are a few other caps on the tank for reference.

 

 

 

 

Tank parameters:

 

Temp 78

SG 1.025

PO4 .02

NO3. 0

Alk 7.5

Ca 440

[OldReefer]

Check for Copper or high Magnesium. I lost a whole tank full of encrusting montis when I ran my Mag up to1800 with Tech M. I don't think the Magnesium did it. I think it was the trace elements that come along with TechM. Namely copper. I got a dulling of color, then lost latches of flesh, then everything broke loose.

[Tink]

I'll give it a check. Did you run carbon on that tank? I run carbon 24/7, so maybe that'll help if it's a copper issue.

[Coral Hind]

Have you made any changes to the tank like lighting lately or recently changed out your carbon? Did the color of the coral change or lighten up at all before this spot formed?

[Jason Rhoads]

I am not sure of the cause, but I recommend making some frags of this to increase chances of survival. You can bank them with another reefer while you work on solving the problem.

[Tink]

It was shortly before my carbon change that I noticed the problem, and the more vibrant of the 2 red caps did have its color fade before it began to recede. No lighting changes to the tank at all.

 

If the problem persists I plan to frag this cap for sure.

[Coral Hind]

I would flip it over if not glue down and check to make sure you don't have monti eating nudibranchs. I doubt it because they normally start on the edges but it's best to make sure to rule them out.

[flooddc]

I have a similar issue with my red cap colony too. Was doing great  for almost 2 years. In past few months it began to whited-out slowly. I originally thought it was nudis but didn't fine any. Can't figure out exactly what wrong, but currently have a temporary solution. H2O changes every 10-14 days. As soon as I did the water change, most of it colored back up. Try changing your water to see if it help.