I'm going to be getting some leathers and I've been reading they are toxic when shedding. And that carbon can clear that. I have a tidal 35 on a 20 gallon and I'm not sure how to set it up to negate them if they do chemical warfare. I don't really want to use carbon unless that's just the best thing? I saw somewhere seachem purigen can remove their toxins? Are there other options?

