Live rock getting white

[Robin Alv]

Two pieces of live rock are starting to be coated in white. Anybody have any clues?

All my parameters seem fine (ph 8.3, sg .22 ammonia and nitrites 0 and nitrates trace).

 

[Blossom112]

I have that happen it seems to come and go depending on where the worms are feeding.
Just my theory with nighttime viewing

 

[Grins]

It is typical for some of the coraline to die off and the purple will turn white. Provided you have good husbandry it should come back without a problem.

 

[Robin Alv]

Thanks guys. While I love the learning process I wish I already knew more so I didn't "freak" - I thought all the LR was going to just die.

 

[Blossom112]

oh dont worrie i was stressed to ,untill grins told me not to worry

 

[rxdoc_85]

what kind of lighting do you have? sometimes when you put a piece of LR in your tank under a strong light the coralline can bleach out, especially if it was previously kept under lower intensity light. i had a piece that did that some, but the coralline that likes the light is starting to take over, and it's nicer looking now than when i bought it.

 

[Robin Alv]

I haven't changed my lighting, nor hours. I have 10,000K day and I forget the other (I will go look at the old box later - bad at this) and I keep the lunar on at night.

 

[cav]

I have peices of rock that had lovely purple but then started turning white. I then discovered it was crabs scraping the coraline off the rock

 

[Robin Alv]

As far as I know, with the exception of one small emerald crab (which I never see) I haven't any crabs.

 

[Grins]

It sounds more like fading coraline or a calcium film in your case. If it was scraped down to bare rock than yeah I'd say an urchin, crab, star could be the problem.