Does carbon bleach your corals ? (Kent carbon recall)

[Canuckgod420]

I also had the sme issue when I switched to Kent, 1 afternoon I switch out the carbon, next morning serious colour loss. I simply turned off my carbon reactor, reduced my light duration, and kept a watchful eye.
Non of my corals died, but some where looking pretty stressed, no polyp extension, complete colour loss, small amounts of tissue recession.
But in a couple weeks things started to turn around, colour returning, polyps coming out. Now 3 months later everything is growing so fast I cant keep up, my colour has never been better, it crazy.

[daniella3d]

I reduced my ligth for one hour but I think I will reduce it a bit more.

How many hours did you reduce you light?

My pocillopora that I thought was not affected have started to lose tissue and I can see some patches of brown jelly now. wow...this is nasty.

Originally Posted by Canuckgod420

I also had the sme issue when I switched to Kent, 1 afternoon I switch out the carbon, next morning serious colour loss. I simply turned off my carbon reactor, reduced my light duration, and kept a watchful eye.
Non of my corals died, but some where looking pretty stressed, no polyp extension, complete colour loss, small amounts of tissue recession.
But in a couple weeks things started to turn around, colour returning, polyps coming out. Now 3 months later everything is growing so fast I cant keep up, my colour has never been better, it crazy.

[whatcaneyedo]

A friend provided me his 40 lbs box of Kent Carbon when he shut down a few years ago (2006 maybe?). I didn't use all 40 lbs myself but I did use it exclusively for probably 3 years without issue. However I have heard cases where contaminates like metals have found their way into Carbon and caused coral death. For the last few years I've been using BRS Fine Lignite Carbon because it seemed like a better value.

[MarkoD]

I use the fluval carbon and I don't really know what it does (never been without) but I see no negative effects

[Myka]

Paddy, if you're so sure it isn't the carbon why don't you use some of Daniella's carbon in your reef? Anything is possible, and it sure seems suspect that there are so many people having troubles with their new container of Kent carbon in the last month or two. It will be interesting to see how this develops.

I jut ran out of Kent carbon a couple weeks ago, and decided to try out the Brightwell Aquatics carbon as I have really been liking their other products lately. It sounds like I was lucky for once! Whew.