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Re: Nitrates vs. DOCs
Bob Dixon wrote:
Does
>anyone know of a way to monitor carbon to know when it is nearing the
end of
>its useful life and is ready for replacement?
>
>Bob Dixon
I think I saw in some old tropical fish book that you can put some
methylene blue in the water and see if the blue is removed by the
carbon to see if the carbon is still active.
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