Does carbon bleach your corals ? (Kent carbon recall)

[Casey8]

Originally Posted by daniella3d

Same here...kent carbon...most coral are pale and some bleached. All my photosynthetic sponges are dead! My pink digitata is nearly white and show no polyp extension. Polyp extension is very low even on my shaggy acropora which is not shaggy anylonger. I put Kent carbon, go to sleep and wake up to that mess.

Never again will I use that crap. What's in it that could cause this? I used all sort of brand of carbon before without any visible effect...ever.

I removed the carbon and did 2 30% water change but it might take many water change to stop the bleaching. Now things have seem to stabilize but it will take months for some of the coral to recover, if they ever do. My blue haliclona photosynthetic sponges are gone. had them for 2 years

Thanks for your input, Daniel. I just got a new brand Marineland carbon. I had used this brand since I first started in this hobby. Now all I am hoping is I can save some of the corals left. All my favorite corals are bleached out so badly, they completely turned white today. The ones that I don't care very much are still having some faded color on them Life is like that, always lost something that you cared about and loved the most, same thing happened with fish too.

[daniella3d]

Good luck with your system. It has been about a week for mine and it is still acting wierd. I now have some brown stuff covering some corals so I am guessing some of my digitata died as well.

It would be important to find out what is causing this and if any others have had similar reaction. I did not even talk about it at first because I was a bit skeptical about carbon causing this but now that you talk about your own experience with it, then it makes me beleive that my thoughts that it was the carbon were right.

Originally Posted by Casey8

Thanks for your input, Daniel. I just got a new brand Marineland carbon. I had used this brand since I first started in this hobby. Now all I am hoping is I can save some of the corals left. All my favorite corals are bleached out so badly, they completely turned white today. The ones that I don't care very much are still having some faded color on them Life is like that, always lost something that you cared about and loved the most, same thing happened with fish too.

[Casey8]

I am glad you had chimed in that you had the same problem with this Kent carbon too. If not, I may have thought I am the only one complaining about bleaching corals for using bad carbon. Nothing I can do about coral's bleaching now, I just hope whatever I have left are recovering soon.

[daniella3d]

I once had a shaggy acropora bleach completely and no polyp extension after I took it from one tank to the other without any acclimatation. I did not care about it because under T5 it was all brown and really ugly. It remained for about a month like that and after a month the polyps started to come out and that coral is gorgious today. It has grown about 10 times the size. It took about 2 months to color up to a very nice bleu/green with purple tips under metal halide.

So there is hope

I will return that carbon to the store for a refound and tell them what hapened and that I am not the only one and will take the Seachem carbon instead.

Originally Posted by Casey8

I am glad you had chimed in that you had the same problem with this Kent carbon too. If not, I may have thought I am the only one complaining about bleaching corals for using bad carbon. Nothing I can do about coral's bleaching now, I just hope whatever I have left are recovering soon.