Originally Posted by
Richard
I find that article and the study very interesting and very annoying at the same time. The annoying part of the article is that the authors are declaring activated carbon as causing HLLE when it sounds like it was the dust that was the likely the cause.
The really interesting part of the study is that they were able to cause HLLE all the fish exposed to the unwashed lignite carbon and microlesions in the fish exposed to the unwashed pelleted carbon. The annoying part of the study is it appears they didn't take the next logical step and expose a group of fish to a non carbon dust of similar size/composition to see if it caused HLLE as well. Hopefully that will be a future study.
Still it's not enough for me to stop using carbon. I've never had HLLE problems from it but then again unlike the study I never ran a tank with no skimmer, no mechanical filtration, and used unwashed dusty carbon without rinsing it first.
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