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Re: [APD] KH goes UP after adding CO2



I am not sure that it is silicate, no.  It is blasting sand from home 
depot which I thought was silica sand.

I will try putting some vinegar on the dry sand and see if there is any 
visible reaction.

Thanks

David A. Youngker wrote:
> Barry, are you quite sure that the sand in your tank is silicate? Have you 
> tested _it_ with acid? If the amount of CO2 you're adding drives up the 
> carbonate hardness that much in such a short amount of time, then even a 
> weak acid like acetic (vinegar) should react with whatever is dissolving 
> into the water column...
>
> -Y-
>
> David A. Youngker
> jaafaman at comcast_net
>
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> Aquatic-Plants at actwin_com
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>
>   

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