Can I mix granulated ferric oxide with granulated carbon in a media bag? Or does it have to be separate?

Can I mix granulated ferric oxide with granulated carbon in a media bag? Or does it have to be separate?
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1 Answer

Answer :

It’s the same water that goes through them whether they are separate or not. I had my marine tank in the dark ages, so I am no longer an expert, but it seems to me that carbon is non-reactive, and gfo is already oxidized; I don’t see what difference it can make.
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