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Malachite Green


>From: toado at iug_co.nz (Toado)
>To: Aquatic-Plants at actwin_com
>Subject: Re: Aquatic Plants Digest V2 #975
>Date: Thu, 25 Sep 1997 11:25:02 GMT
>There's been some confusion recently concerning whether malachite
>green contains copper. Malachite green itself is a purely organic dye,
>useful in the textile industry, as a stain by microbiologists, and as
>a pH indicator by old time chemists. It does not in itself contain
>Almost all (if not all?) commercial preparations for the aquarium
>contain substantial quantities of copper sulfate- Its much cheaper
>than malachite green so the manufacturers do a little cheating :).