Why is my Coraline getting white spots?

[Jaystah]

I just recently took out a few rocks from my tank to make it lighter for its new stand. once everything was in place i started to notice a few white blotches on those same rocks. any idea if the coraline will grow back or anything i can do to stop it from dieing? all parameters are fine too.

 

[MisterP]

Yes it will grow back in a few weeks.

 

[neuro]

it will grow back, slowly. though, my problem was lack of magnesium

 

[Jaystah]

Cool, thanks a lot guys.

 

[slief]

If you removed those rocks with the white spots and put them back in, I would expect to see some of the coraline die off or bleach/turn white. Coraline when exposed to O2 for long enough (even a few minutes) will do that. As mentioned, it will grow back.

 

[MondoBongo]

If you removed those rocks with the white spots and put them back in, I would expect to see some of the coraline die off or bleach/turn white. Coraline when exposed to O2 for long enough (even a few minutes) will do that. As mentioned, it will grow back.

i've seen this exact thing with coraline on my tank walls, above the low water mark when i siphon for a water change. the areas that get left high and dry when i siphon are much more prone to bleaching.

 

[Jaystah]

Yes, noticed the bleaching on my tank wall also. Gonna take some patience. thanks again fellas