The Planted Tank Forum - View Single Post - Anyone made their own Na2S2O35H2O dechlor? Need numbers here...
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post #8 of (permalink) Old 05-16-2012, 04:16 PM
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Not to sure but EDTA is chelating agent which is used to bind metals so in the cause of water conditioner it probably used to bind heavy metal from tap water to make it harmless. So i don't think you need it unless you worry about copper or other metals that might leech out from your pipes.

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