Does carbon bleach your corals ? (Kent carbon recall)

[daniella3d]

I got the result from my water analysis.

I got my water analyzed by a professional lab and the result show an abnormal concentration for copper especially.

The column named Daniella is my current aquarium water after 7 water changes and addition of polyfilter for a few days. The colum named "charbon" (carbon) is the result of analysing the water that come from a clean food grade container that had one gallon of water with 1/4 cup of well rinsed Kent Reef carbon running for 10 hours. I had put about one cup in my aquarium.

The result of 346 ug/l translate to .346 mg/l of copper, way too much and the reason why my corals died and bleached.

I guess this proof that more carbon than what they have in their recall list is affected since the expiration date on my container is EX21NO14, which is not in the list.

Magnaneese and kicket released is also a bit high with this carbon, but it is the copper that is to blame for the coral death. I am going to send a sample of the carbon and this lab result to Kent tomorrow.