Does carbon bleach your corals ? (Kent carbon recall)

[daniella3d]

Hey casey, how are your corals doing? are they coming back from the bleaching? Mine is a mixed bag. Some are improving and some seem to be going worse and bleaching still.

What is strange is that the corals are bleaching where the light does not reach, from underneat, so I am not sure if I should increase the light instead because what is exposed to light seem to be regaining a bit of color.

I really don't know what to do now. Seem the coral are missing a lot of zooxanthellae.

Originally Posted by Casey8

No wonder my skimmer had pulled a lot of black colored in the first 2 days.

[daniella3d]

That's what I want to know. I will have my water analysed by a pro lab Thursday. I had done this analyse for heavy metal and all metal about a month ago, so I will be able to compare. We will also run carbon in a bucket and anayle that water, just to see how much of the metal could have leached.

My greatest concern is if the liverock have absorbed these heavy metal. I will now use polyfilter for a few months until my system return to total normality.

You don't have to flush the tank. I will post here my result on my tank as how far this contaminant went and how much of it still remain.

Originally Posted by kien

I don't think that it'll be easy to tell if a particular batch of carbon is good or bad

Another thing I'm worried about now is, once you put bad carbon into your tank, how easy would it be to get all that nasty stuff out??? It's almost like you have to flush the tank just to be sure.

[George]

Kent is recalling their carbon...
http://www.kentmarine.com/news/news-...arine-reef.htm